Rough Idling
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MBWorld Fanatic!
Joined: Jan 2007
Posts: 1,986
Likes: 9
From: Toronto
V12TT
Rough Idling
hey guys I got all the 16 spark plugs replaced and now I'm having this Rough Idling problem. It shakes every 3-4 seconds feels like if it's about to stall (even in neutral). Checked proper installation of the air-filters but haven't checked or cleaned MAF or replaced fuel filter. Just wondering if there's an obvious known solution to this rough idling problem before I turn my hands all black.
TIA
TIA
MBWorld Fanatic!
Joined: Jul 2006
Posts: 1,578
Likes: 7
04 S430 (sold),05 X5 4.4i, 02 325i, 87 560SL, 85 Alfa Romeo
hey guys I got all the 16 spark plugs replaced and now I'm having this Rough Idling problem. It shakes every 3-4 seconds feels like if it's about to stall (even in neutral). Checked proper installation of the air-filters but haven't checked or cleaned MAF or replaced fuel filter. Just wondering if there's an obvious known solution to this rough idling problem before I turn my hands all black.
TIA
TIA
Did you gap the plugs properly? Make sure you used the correct plug.
My car idles rough, but my RPM,s are correct. I just figures out that my motor mounts are collapsed. This could be your issue ONLY if your RPM's are correct at idle and the roughness is only at idle.
Junior Member
Joined: Dec 2007
Posts: 27
Likes: 1
From: CT, USA
2000 S500
I just remembered I had a similar problem recently after a plug change. It was on my S-10, but my problem was not with the vehicle, it was one of the plugs. When I removed them to inspect I noticed one plug had a hairline crack on the porcelean part. When I held it up to show someone it fell apart. The S-10 has plugs easy to get to. The W220, not so easy. Don't know if this is worth a try.
