My car idles roughly when it is first started. I have read many suggestions for fixing that, but can't figure it out.

The rough idling causes some bumpety-bump in the engine mounts. How can I tell if they are OK as-is or need replacement. There are no visoble cracks and no aging is visible. They look OK.

Thanks, in advance.

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-Steve

There should be at least 13mm between the lower lip on mount & the engine mounting frame.

Any less and they should be replaced.

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Benzmac:
Donnie Drummonds
1991 GMC Syclone
ASE CERTIFIED MASTER AUTO TECHNICIAN
SERVICE MANAGER FOR 14 BAY FACILITY
MERCEDES SPECIALIST 8 YRS
PARTNER IN MERCEDESSHOP.COM

My 560SEL had a very slight rumble at idle. Not so severe that you thought it would die, just enough to make you think that it was wrong to happen in a fine car such as this.

I replaced both motor mounts and the transmission mount, and the problem disappeared. Idle is now smoother, you can bearly tell the engine is running.


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Al Spalmacin
1989 560SEL
1989 190E 2.6

I just had to jump on the bandwagon, I have a 1991 300D and I had the exact problem. Two motor mounrs and $210.00 later my problem is cured and the engine is very, very smooth.