View Poll Results: What could this be?
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Idle Problem
Thread Starter
Newbie
Joined: Nov 2016
Posts: 2
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S550
Idle Problem
I have a 2015 s550 and when cold starting the car, it idles then goes back to normal after about 20 seconds. But this! When I accelerate more to get up to a faster speed, the car idles, puts out a loud idle sound then changes gears. Sounds like a truck for a second when changing gears automatically. Can anyone please tell me what this could possibly be. I purchased an extended warranty on it but I’d like to have some insight into what this could be before taking it in.
