I'm quite new to maintaining the car myself, in this case a C30 T5. The problem is a vibration when i accelerate the car.
Vibration is stronger in 2nd gear when flooring it, and when i step on the gas on 4th or 5th it feels funny, not a strong vibration but seems as not all of the power is being delivered.
-Doesn't vibrate at cruise speed
-Doesn't vibrate when i rev it up in neutral (engine mount)
Any opinions / ideas?