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1988 560SL
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Discussion Starter #1
My 88 560SL has a slight high idle -- ideas for possible cause? And should I be overly concerned (not excesively high, only slight).
 

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One of the BW Old Guard/R129, W204 Moderator
1997 SL500- 40th Anniversary
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7,166 Posts
My 88 560SL has a slight high idle -- ideas for possible cause? And should I be overly concerned (not excesively high, only slight).
Your description is woefully inadequate for us to be of any help. What is th erpm at idle? Same hot as cold? Anything done recently to cause a change?

I realized I never got back to this thread... Below is a link to the influencing factors of the CIS-E idle control for the 560.
http://www.startekinfo.com/StarTek/outside/11883/PROGRAM/Engine/107/M117_56/073-009.pdf
 

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One of the BW Old Guard/R129, W204 Moderator
1997 SL500- 40th Anniversary
Joined
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7,166 Posts
#1- Look for vacuum leak... Then move on down the line toward other factors listed in the attachment in the previous post. If you do not have a manual, link to the online manual in the Egv107, and navigate to the CIS-E control section. 07.3...
 
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