Adjust idle speed / fuel mixture

[jacjam]

Can anyone tell me how you adjust the idle mixture / speed on a '93 190E 2.0 :?:

 

[sunil sood]

there is a hole in the aircleaner top cover.
this leads to the mixture adjusting screw-you need an allen key to adjust it.
it may have a tamperproof plug which has to removed before adjustment takes place.

i have not touched mine as my car has a catalytic converter and one cannot adjust the mixture as the co reading at the tail pipe would almost nil,if the cat is working-special kit required.

 

[piestore]

190 Idle

Hi

Beware of adjusting the mixture screw this is not the idle control. Idle control is done by the ECU via an Idle air valve which is not adjustable