I bought 2013 mini countryman s with 55K miles 3 months ago and I've tried to fix rpm fluctuate (slightly) at idle by replacing battery & spark plugs & ignition coils & air filter & cleaning maf sensor however, it's still same.
There is no engine light. car runs fine. the problem is that it happens only when it's parked and stopped at light and when I stepped off the brake and before I approach to step on gas pedal, rpm drops -50 and car shakes little.
when the car is parked and stopped at light, rpm slightly fluctuate up and down. It really annoys me. I heard it could be vanos solenoid. anybody experienced this kind of problem?
Please advise. Thank you