2016 - 2018 Auto Start / Stop Disable - possible solution
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    1. #1
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      2016 - 2018 Auto Start / Stop Disable - possible solution

      Many of us would like to disable the Auto Start / Stop. There has yet to be a solution.

      Today I came across this https://www.start-stop.cz I sent an email asking if it will work on a 2017 XC90 and he says it will. I wonder if that's true. Does anyone understand the installation instructions? Looks like it may only be around $35 plus shipping.

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    3. #2
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      It's sold on ebay for $30.
      https://www.ebay.com/itm/START-STOP-...QAAOSw07lblNdX

      Here the instructions are in English. Looks like it needs to connect to a button, so probably will not work.

    4. #3
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      Quote Originally Posted by bmcgin View Post
      It's sold on ebay for $30.
      https://www.ebay.com/itm/START-STOP-...QAAOSw07lblNdX

      Here the instructions are in English. Looks like it needs to connect to a button, so probably will not work.
      Correct - won't work without a button
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    6. #4
      Global Moderator GrecianVolvo's Avatar
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      Not sure why anyone would want to do that...every time your car comes to a stop and the engine stops, you contribute less emissions to the environment...
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    7. #5
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      Quote Originally Posted by GrecianVolvo View Post
      Not sure why anyone would want to do that...every time your car comes to a stop and the engine stops, you contribute less emissions to the environment...
      So many reasons I can think of:
      - It's inconvenient
      - It's annoying
      - Newer cars have the capability of turning it off
      - It's overly sensitive
      - I don't want it
      - I'm willing to pay for the extra gas by keeping the engine running
      - I turn it off anyway (it's just a PITA)
      - My other cars don't have start/stop
      - I'd pay extra to get rid of it
      - It doesn't really save that much gas
      - If anyone really cared about the environment, they'd ride a bike
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    8. #6
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      By the way I have a hunch this start/stop 'feature' (ie. bug) can be defeated if someone is able to scope what comes out of the factory radio/computer module. Do the signals end up on the vehicle CAN bus? If so then the SS can likely be tricked into turning off.

      The reason I believe this because I recently installed a newer Pioneer head unit into a vehicle. There is a parking brake signal that goes into the unit in order to allow it to function (ie. certain features are only enabled if you are parked.) Pioneer saw fit to implement something even more complicated, the parking signal must be toggled ON/OFF/ON before the radio wakes up. Connecting to the parking brake isn't sufficient. So someone came up with a little module (likely just a relay) that fakes the signal and allows the Pioneer to work. Now - just get in the car and start it, the little relay toggles the correct signal going into the radio. *poof*! No more nannies in the way.

      I won't be tearing apart my wife's XC90 because she doesn't notice the start/stop feature at all (shocking, I know) but if/when that vehicle becomes mine I'll be far more motivated.

      The relay:
      https://www.amazon.com/MicroBypass-A...s%2C185&sr=8-3
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    9. #7
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      Quote Originally Posted by stick_shift View Post
      So many reasons I can think of:
      - It's inconvenient
      - It's annoying
      - Newer cars have the capability of turning it off
      - It's overly sensitive
      - I don't want it
      - I'm willing to pay for the extra gas by keeping the engine running
      - I turn it off anyway (it's just a PITA)
      - My other cars don't have start/stop
      - I'd pay extra to get rid of it
      - It doesn't really save that much gas
      - If anyone really cared about the environment, they'd ride a bike
      +1!!!

    10. #8
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      One idea to foul the system is to foul the temperature sensor somehow. The Start/Stop does not work if the temperature more than 85 F.


      So, some nerd has to come with a way to make the temperature sensor read 85+F all the time. Also, I'm not sure if taking the temperature sensor cable will do the trick without error codes. If the sensor cable was disconnected, the Start/Stop system loop/circuit will probably be stuck and the SS might not work.

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      Last edited by Nerd23; 06-18-2020 at 06:12 AM.

    11. #9
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      Quote Originally Posted by GrecianVolvo View Post
      Not sure why anyone would want to do that...every time your car comes to a stop and the engine stops, you contribute less emissions to the environment...
      Come on. The feature is profoundly annoying and I would love to see how much actual CO2 is being saved from being released into the environment.

      Making a left turn across an intersection with this feature on is one of the more dangerous feelings I’ve ever had in a Volvo.

      I use start stop in certain situations but having the option to turn it off permanently should be up to the car owner

    12. #10
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      I do not find that the start/stop is an impediment to safe driving. I have been driving hybrid cars with a start/stop function for 10 years without any issue. The only irritant that I have is that it does not work all the time because of the battery charge.
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    13. #11
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      Quote Originally Posted by Noonzio View Post
      Correct - won't work without a button
      In our case, I think the "Button" that they are referring to is the start/stop knob.
      The directions seem to indicate that you tie this into your existing ignition switch/button. "original wire do not disconnect"

      With all of the expensive tech in the XC90, I really don't want to risk an out of warranty repair that I could have caused.


      There has to be some Coding that can be done to the ECU with VIDA or another programmer solution. Volvo doesn't make it easy.

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      Quote Originally Posted by FlyRevII View Post
      In our case, I think the "Button" that they are referring to is the start/stop knob.
      The directions seem to indicate that you tie this into your existing ignition switch/button. "original wire do not disconnect"

      With all of the expensive tech in the XC90, I really don't want to risk an out of warranty repair that I could have caused.


      There has to be some Coding that can be done to the ECU with VIDA or another programmer solution. Volvo doesn't make it easy.
      Maybe someone can mount a small motorized rubber wheel on the drive mode scroll. It can scroll the drive mode to individual mode and click it by using a bump on the rubber wheel.
      Individual mode is the last in the list. So just scroll to the last. Shouldn't be that hard.
      Last edited by FusionRedXC60; 06-18-2020 at 11:22 AM.
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      Quote Originally Posted by stick_shift View Post
      So many reasons I can think of:
      - It's inconvenient
      - It's annoying
      - Newer cars have the capability of turning it off
      - It's overly sensitive
      - I don't want it
      - I'm willing to pay for the extra gas by keeping the engine running
      - I turn it off anyway (it's just a PITA)
      - My other cars don't have start/stop
      - I'd pay extra to get rid of it
      - It doesn't really save that much gas
      - If anyone really cared about the environment, they'd ride a bike
      This is one of my favorite post responses ever!
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    16. #14
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      What all does the external temp sensor adjust? I know it can affect the climate control some, but if it doesn't affect the motor, could you trick that (wire in a false reading) into thinking it was above or below the setting that disables start stop?
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    17. #15
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      Quote Originally Posted by FlyRevII View Post
      In our case, I think the "Button" that they are referring to is the start/stop knob.
      The directions seem to indicate that you tie this into your existing ignition switch/button. "original wire do not disconnect"
      I interpreted the circuit in the ebay link in post #2 differently. What they label as "ignition key" is our "start/stop" button. What they label as "SS button" exists as a physical button in some non-Volvo vehicles with engine start-stop feature, but the SPA Volvo's relay for this is not associated with any physical button.

      If the connection is made to the leads under the SPA's start/stop ignition key, I suspect the vehicle's diagnostic isn't going to like it very much.

      In vehicles with a physical engine start/stop (that is separate from the ignition key), I believe the green leads sense the status of the OE start/stop switch (i.e. whether the corresponding circuit is closed or open). This aftermarket circuit is actively sensing when the ignition key is on (i.e. vehicle electronics are on). Beyond that, I'm not sure what it does other than having the effect of permanently countermanding the OE start/stop switch's effect.
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    18. #16
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      Quote Originally Posted by DFrantz View Post
      What all does the external temp sensor adjust? I know it can affect the climate control some, but if it doesn't affect the motor, could you trick that (wire in a false reading) into thinking it was above or below the setting that disables start stop?
      Since our Volvo doesn't have a physical SS botton, most of the parts shared on the websites will not work.

      Nonetheless, two things can be tried (Disclaimer: at the owner risk to do so because the outcome is not clear if it will damage something else or require trip to the dealer):

      1- Unplug the cable for the temperature sensor and see what happens
      2- Unplug the temperature sensor fuse and see what happens

      I think the start/stop system relay mainly on temperature sensor number 2. It's not clear if other systems on the car use the temperature sensor values. So, we have to be really careful.



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      Last edited by Nerd23; 06-18-2020 at 02:01 PM.

    19. #17
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      Quote Originally Posted by stick_shift View Post
      So many reasons I can think of:
      - It's inconvenient
      - It's annoying
      - Newer cars have the capability of turning it off
      - It's overly sensitive
      - I don't want it
      - I'm willing to pay for the extra gas by keeping the engine running
      - I turn it off anyway (it's just a PITA)
      - My other cars don't have start/stop
      - I'd pay extra to get rid of it
      - It doesn't really save that much gas
      - If anyone really cared about the environment, they'd ride a bike
      hahah... The first thing I do every time after turn on the car is to disable start/stop. it has been 4 years....

    20. #18
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      Quote Originally Posted by Nerd23 View Post
      Since our Volvo doesn't have a physical SS botton, most of the parts shared on the websites will not work.

      Nonetheless, two things can be tried (Disclaimer: at the owner risk to do so because the outcome is not clear if it will damage something else or require trip to the dealer):

      1- Unplug the cable for the temperature sensor and see what happens
      2- Unplug the temperature sensor fuse and see what happens

      I think the start/stop system relay mainly on temperature sensor number 2. It's not clear if other systems on the car use the temperature sensor values. So, we have to be really careful.



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      I guess it's really safe to disconnect the temperature sensor.

      Check the below video and let us know if Start/Stop still works with the temperature sensor disconnected or covered with tape. If not, I have another smarter idea....

      Currently living in a very hot area where I can't test if the trick will work or not.

      https://youtu.be/j6Rkwe3_XwI


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      Quote Originally Posted by Nerd23 View Post
      I guess it's really safe to disconnect the temperature sensor.

      Check the below video and let us know if Start/Stop still works with the temperature sensor disconnected or covered with tape. If not, I have another smarter idea....

      Currently living in a very hot area where I can't test if the trick will work or not.

      https://youtu.be/j6Rkwe3_XwI


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      Would it bother you if the temperature number on driver display or Sensus screen is way too high?
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    22. #20
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      Quote Originally Posted by FusionRedXC60 View Post
      Would it bother you if the temperature number on driver display or Sensus screen is way too high?
      It depends which is bothering you more. If the stubid start/stop system bothers you more, you will probably be able to live with the inaccurate temperature reading.

      Also, it's not clear if disconnecting the temperature sensor trick will work. Someone brave has to try that... Probably when the temperature sensor is disconnected, - - will show up instead of a wrong number. We all can live with a - - I guess


      Check the below post: the temperature sensor reading will affect how the AC is working. Disconnecting the temperature sensor will probably trigger a check engine light. So, the only solution is to make the temperature sensor read higher than 85F to avoid affecting the AC and the Start/Stop system will not function.


      https://r.tapatalk.com/shareLink/top...ink_source=app



      https://forums.swedespeed.com/showth.../228586?page=1




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      Last edited by Nerd23; 06-19-2020 at 06:11 AM.

    23. #21
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      ambient temperature sensor will mess with climate unit. they go bad somewhat regularly, first complaint is ac does not work, when its 90 outside and sensor reads 40, ac doesnt bother, it will just move outside air. i havent heard of it because they seem to go low, not high, but i suspect the opposite will happen if too high. you turn on heat and get outside air if car thinks it is hot out

    24. #22
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      Quote Originally Posted by brich999 View Post
      ambient temperature sensor will mess with climate unit. they go bad somewhat regularly, first complaint is ac does not work, when its 90 outside and sensor reads 40, ac doesnt bother, it will just move outside air. i havent heard of it because they seem to go low, not high, but i suspect the opposite will happen if too high. you turn on heat and get outside air if car thinks it is hot out
      You are absolutely correct...

      I guess we need a way to manipulate the reading as follow.

      On summer, the temperature should above 85F.

      On winter, the temperature should be below 23F.


      On these situations the Start/Stop will not work all the time.




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    25. #23
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      Quote Originally Posted by Nerd23 View Post
      You are absolutely correct...

      I guess we need a way to manipulate the reading as follow.

      On summer, the temperature should above 85F.

      On winter, the temperature should be below 23F.


      On these situations the Start/Stop will not work all the time.




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      Can anyone check if the start/stop works if the defroster button is on (the second button after the emergency indicators).


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    26. #24
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      Quote Originally Posted by LukeyBL View Post
      Come on. The feature is profoundly annoying and I would love to see how much actual CO2 is being saved from being released into the environment.

      Making a left turn across an intersection with this feature on is one of the more dangerous feelings I’ve ever had in a Volvo.

      I use start stop in certain situations but having the option to turn it off permanently should be up to the car owner
      Sorry but I will dismiss the "safety" argument. I have driven every Volvo under the sun, since the implementation of the start/stop technology to the tune of 28,000-30,000 miles per year (which includes 3-4 different Volvos per year, not including the occasional 5th, 6th or 7th additional Volvo I get to grab and drive for a few hundred miles at a time) plus our family car (different Volvo each year) which is my wife's although I estimate that I put in another 5,000 miles each year for personal use.

      I have NEVER experienced this with any of these cars.

      It never bothers me to have this feature on, my brain has simply adjusted to it and barely notice it. To be fair, the only car that I found it was more perceptible than in any other model, was the XC40 T5 we had last year.

      If you care, ONE BIT (you don't have to be a "tree-hugger" if that terms bothers you) about the environment, you can do your bit and let Start/Stop do the job it was designed for: reduce emissions (CO2) and also reduce fuel consumption during traffic. You can find many studies where fuel savings, to the tune of 8%+ can be realized but, more importantly, CO2 emissions can be reduced as much as 20%.

      Think of how many millions of cars are on the road and stuck in traffic conditions, not per day, but every minute of each day, in the U.S. and around the world...
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    27. #25
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      Quote Originally Posted by GrecianVolvo View Post
      <snip>
      If you care, ONE BIT (you don't have to be a "tree-hugger" if that terms bothers you) about the environment, you can do your bit and let Start/Stop do the job it was designed for: reduce emissions (CO2) and also reduce fuel consumption during traffic. You can find many studies where fuel savings, to the tune of 8%+ can be realized but, more importantly, CO2 emissions can be reduced as much as 20%.

      Think of how many millions of cars are on the road and stuck in traffic conditions, not per day, but every minute of each day, in the U.S. and around the world...
      I'll say it plainly: I don't care ONE BIT about the carbon dioxide emissions. CO2 is not a poison, despite all the dire warnings. Plants eat it for food! (I'll plant another bush next spring to make up for my share.) Cutting down the rainforests does much more harm to the earth than a few volvo users turning off their SS. (Besides, all the newer XC90 owners have likely disabled it anyway, it's only the suckers who bought an early model that are still gnashing their teeth!) Those millions of drivers could well be given the option to start/stop their cars so they can feel good about themselves.

      Another completely misguided idea is forcing everyone to burn ethanol. One day someone will dig up our bones and wonder "What kind of culture grew food only to turn it into fuel?" (but that's another topic)

      *deep breath* I'll likely need to just live with this "feature." But on my next car this will be a deal breaker.
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    28. #26
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      Quote Originally Posted by GrecianVolvo View Post
      Not sure why anyone would want to do that...every time your car comes to a stop and the engine stops, you contribute less emissions to the environment...
      No one likes it. It hardly helps the environment especially in my case as I far away from a large city. The automakers dropped it as they are in touch with the consumer. Had I realized what I was getting into before I bought the car, I would have gone another direction. In short, it is annoying. The same reason cars are not entirely banned is the same reason I want to car to keep running.

      Making a left turn, with traffic speeding towards you, is much riskier than it needs to be. The odds that your car will not start or stall or lurch is much higher than if the car was running. It may not have happened to you yet, nonetheless, you're adding risk.

    29. #27
      Global Moderator GrecianVolvo's Avatar
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      Quote Originally Posted by stick_shift View Post
      I'll say it plainly: I don't care ONE BIT about the carbon dioxide emissions. CO2 is not a poison, despite all the dire warnings. Plants eat it for food! (I'll plant another bush next spring to make up for my share.)
      I think that you do possess a certain level of education/awareness, being part of the XC90 demographics; you should know how increased CO2 emissions contribute to the green house effect which affects us all (plus, future generations). I would rather accept a statement "I don't care about CO2 emissions" vs "CO2 is not a poison"

      Cutting down the rainforests does much more harm to the earth than a few volvo users turning off their SS.
      The world does not revolve around Volvo drivers or any particular brand's drivers; the world depends on the entire population doing its part. If you don't wish to share that sort of responsibility, it's your choice and I think have you made it very clear but let's use real arguments vs "Volvos turning off their start-stop function is not going to do anything one way or the other)"...

      (Besides, all the newer XC90 owners have likely disabled it anyway,
      You are incorrect.

      it's only the suckers who bought an early model that are still gnashing their teeth!) Those millions of drivers could well be given the option to start/stop their cars so they can feel good about themselves.
      I think it's very disrespectful, on your part, calling those who bought MY16 and MY17 XC90s "suckers"...

      Quote Originally Posted by bmcgn
      No one likes it.
      I think the sales numbers don't agree with you.
      Quote Originally Posted by bmcgn
      Making a left turn, with traffic speeding towards you, is much riskier than it needs to be. The odds that your car will not start or stall or lurch is much higher than if the car was running. It may not have happened to you yet, nonetheless, you're adding risk.
      I drive in every imaginable type of condition, throughput the year (save for blizzards or constant torrential rains); highway, stop and go in one of the most congested areas in the world, turning, merging etc and for tens of thousands of miles each year...never had it happen to me. I have colleagues who drive as much as I do or even 15% to 20% more than I do; they have never had it happen to me.

      So, there is no risk, it's a feature that simply works to reduce emissions and save a little extra fuel...
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    30. #28
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      I really don’t understand why people hate SS so much. It’s ok for me, as someone said above, my brain is used to it.

      One small trick if you don’t want it to engage (such as when making a left turn on traffic): set the gear in manual for a second or so before stopping and then back to automatic after the car stopped. The SS will not engage and engine will keep running for a quick sprint.


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      I don't expect everybody in this forum to be a PhD, but this post is very concerning and I am alarmed reading the comments.

      If you trick the temperature sensors expect lots of issues with your HVAC and your engine refrigeration. Not worth it.

      If you are concerned with the Start/Stop in a left turn, move the gear lever to manual and switch it back to auto once you turn. I do that when I am coming to a stop and I see the traffic light is going to turn green. A small inconvenience that has saved me a ton of gas and emissions since I got the XC90.

      I will save my words for the individual that said in 2020 that CO2 is just plant food and we shouldn't care about them

    32. #30
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      Also there's a 'slightly' easier way to switch to individual mode by pressing the scroll wheel once and then pressing individual on the display.
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      Quote Originally Posted by carz View Post
      I don't expect everybody in this forum to be a PhD, but this post is very concerning and I am alarmed reading the comments.
      was going to be a smart ass and just tell people to unbuckle, but i fear many would miss the satire and actually stop wearing seat belts.

      funny but the most promising is a miscalibrated battery or a partially weak battery. theres a range in there that will disable start stop without displaying low battery message. not sure the numbers but say 50% charge displays message and under 75% charge disables start stop. just install weak battery and/or figure out how to confuse battery monitoring system and say goodbye to SS for good. actually had a customer complaining his start stop never works. i kinda chuckled. he does less than 1k a year so battery is never charged enough to activate ss.

    34. #32
      Junior Member
      Join Date
      Jan 2018
      Location
      Cornwall, NY
      Posts
      518
      No one likes it.
      Speak for yourself. I think it's great, and I agree 100% with Grecian Volvo's posts. I think it's just a big-swingin'-dick thing--"Nobody's gonna tell me how to drive my car"--and if you are really having trouble accommodating it in things like left-turn situations, you're not a very good driver.

    35. #33
      Junior Member john_hamster's Avatar
      Join Date
      Jan 2015
      Location
      Bellingham, WA
      Posts
      149
      My only objection to Auto S/S is the removal of the “option” button and rolling it into the touchscreen in later models. Far more convenient for the driver who wishes the feature disabled to simply push a button, rather than page through touchscreen for selection.

    36. #34
      Junior Member
      Join Date
      Oct 2018
      Location
      Illinois
      Posts
      15
      Quote Originally Posted by theclutch View Post
      +1!!!
      +1!

      Car manufacturers nowadays collect every piece of usage data possible, and make decisions based on what their analytics group can tell from the data. A small example for those who can spare a few minutes. The fact they have started offering the option to turn it off permanently in newer models is telling enough. As someone with a BS in biology, a MS in Math and CS, and a PHD in an interdisciplinary field, frankly I'm disgusted by how an unwanted feature like this was imposed on the customer base and the amount of virtue signalling used in defending it.

    37. #35
      Junior Member
      Join Date
      Dec 2016
      Location
      NJ
      Posts
      12
      Quote Originally Posted by GrecianVolvo View Post
      It never bothers me to have this feature on...
      You are the lucky one, but you cannot deny the numerous reports here, in this forum, that this feature failed to work.

      When you release the brake pedal, and this thing failed to start the engine, left you stranded in the middle of traffic intersection, that's when people get seriously "bothered"
      2017 XC90 T6 Momentum White

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