Hi there! My name is Daniel. I'm new to the S40, new to Volvo, and new to this forum. I recently purchased a 05 S40 T5 AWD and decided to join swedespeed because it seemed like there is a lot of knowledge on these vehicles here. I'm coming from owning a bunch of old, beat up Hondas so this is very different for me. I have a bunch of questions about aftermarket parts that are currently installed on the car, as well as issues I'm having.I'm not really sure where I ask all these questions so I am posting in the S40 forum. To keep this from turning into a novel, I'll just start with the biggest issues. I noticed after a few days of driving that the coolant level in the reservoir was slowly diminishing. I tried to look for a visible leak in the system but have not spotted anything yet. I have read that the upper radiator hose t and the reservoir itself are common failure points. What is the best way to thoroughly check the system? Also, I have been driving the car with a warning that says "Anti Skid Service Required". Sometimes the car drives like normal, and sometimes my dash lights up with abs warnings and "brake failure" as well as reduced engine performance and immobilizer. How do I go about fixing this. Could it be a problem with the charging system?