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· Banned
1993 400E
7,400 Posts
Where can I find good advice how to adjust a good idle without measuring Equipment?
Thanks for help.

The idle speed is electronically controlled.

I believe you looking to smooth the idle with the fuel mixture.

Basically, using a 3mm long allen tool, adjust the fuel mixture screw slightly clockwise or counter clockwise and see if there's an improvement.

It's not the correct way to set the lambda ratio, but not the first
time it's been done that way.


· Registered
1992 300CE 24v C124
113 Posts
Discussion Starter · #4 ·
When I depress the throttle and the engine is warm, it feels like the ignition is too high.When engine is cold, no problem. The problem came after the workshop adjusted Hc and Co. I thought I could adjust fuel mixture . Have too far to the workshop.
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