M-Class (W163) Produced 1998-2005: ML 230, ML 320, ML 350, ML 400 CDI, ML 430, ML 500, ML 270 CDI

Shudders at idle in gear w/ brakes on

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Old Nov 23, 2011 | 01:43 AM
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i-xclr8's Avatar
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'99 ML430
Shudders at idle in gear w/ brakes on

I think this is my first posting. I did a search with no luck.

My wife's '99 ml430 shakes when the brakes are applied at idle speed or driving at a crawling speed with a foot on the brake.

My first thought is a vacuum leak to the brake booster ....or a failed check valve...or something related.

I looked at the booster and did not hear anything strange, but I saw some strange wiring on the booster. I'm thinking that something too "smart" here may be acting "stupid" if there is a failure somewhere.

Anyone heard of this? Or, are there common problematic parts within this system that could cause these symptoms.

Thanks,
Jon

Sometimes I think I should stick with Japanese cars since I'm into 300 zx twin turbos.


http://i82.photobucket.com/albums/j2...8/DSC04067.jpg



Last edited by i-xclr8; Nov 23, 2011 at 01:51 AM. Reason: added pics
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Old Dec 21, 2011 | 03:41 PM
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you should check your engine mounts
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