E550 w211 long crank and slight rough idle
Thread Starter
Junior Member
Joined: May 2020
Posts: 19
Likes: 2
2003 W211 E500
E550 w211 long crank and slight rough idle
Hello, I have a w211 e550
Sometimes it takes a couple seconds to crank over and sometimes it's instantaneous. Also has a very very slight rough idle. Almost like a small jolt at idle. Any suggestions. Thank you
Sometimes it takes a couple seconds to crank over and sometimes it's instantaneous. Also has a very very slight rough idle. Almost like a small jolt at idle. Any suggestions. Thank you
Junior Member
Joined: Sep 2014
Posts: 45
Likes: 3
From: San Antonio, TX
2008 E550
I don't know about the time from crank to start. But the slight jolt the moment it starts might indicate a bad motor mount. Do you feel a vibration or louder than normal sound in the interior?
Thread Starter
Junior Member
Joined: May 2020
Posts: 19
Likes: 2
2003 W211 E500
It almost feels like the starter motor may be a little tired. The slight 'misfire' is very faint and the revs on the dash don't change. No codes, maybe it could be a coil pack, I'll check today. Thank you.
