Questions about stumbling at idle
Thread Starter
Newbie
Joined: Aug 2025
Posts: 6
Likes: 2
From: Nashville, TN
2002 CL500 AMG
Questions about stumbling at idle
Hey Everyone,
I have recently noticed the car stumble at idle after it’s gotten warmed up. It’s very random and intermittent. It’s so quick the RPM doesn’t register it.
I also have had 2 occasions where the car didn’t want to start. Crank no start. Unsure if it’s related. I also have an issue with the key not releasing to be removed unless I jam the shifter hard over into park. Or it eventually lets me take the key. Seems to be a some sensor. If this happens again I plan to try jamming the shifter over and see if it immediately fixes it.
The no start could be the sensor for being in park. Or could be another issue. CPS comes to mind. Maybe MAF. Might also be need new plugs and wires. No clue when it’s been done. But this is a pretty inconsistent idle stumble.
Would love to hear thoughts about diagnosing this further.
I have recently noticed the car stumble at idle after it’s gotten warmed up. It’s very random and intermittent. It’s so quick the RPM doesn’t register it.
I also have had 2 occasions where the car didn’t want to start. Crank no start. Unsure if it’s related. I also have an issue with the key not releasing to be removed unless I jam the shifter hard over into park. Or it eventually lets me take the key. Seems to be a some sensor. If this happens again I plan to try jamming the shifter over and see if it immediately fixes it.
The no start could be the sensor for being in park. Or could be another issue. CPS comes to mind. Maybe MAF. Might also be need new plugs and wires. No clue when it’s been done. But this is a pretty inconsistent idle stumble.
Would love to hear thoughts about diagnosing this further.
