Random high idle speed ...

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Braincrank

Active Member
Joined
Sep 12, 2012
Messages
392
Location
West London
Car
Mercedes 200E
Hello all
I wonder if anyone of you can point me in the right direction of how to tackle this issue.
Every so often, my B180 CDI (automatic) is idling around the 1k mark, normal idle speed should be around 800 or thereabouts.
The engine management light is not on when this happends.
When I put it in N and reff the engine it sometimes settles back to normal idle speed.
The car has been on diagnostics but it doesn't show any codes 🤔
Before I take it to MB for investigation, I was hoping you might have an idea.
Many thanks in advance
 

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