380SL Lambda Location
 

I have a wire short from the Lambda unit to the idle control unit on my 380SL. It is intermittent. Sometimes I get 4 volts at pin 2 on the idle control unit and it runs fine, then I get 0 volts and I get the high idle. I Checked the relay. God I hate to work on 107 body SLs everything is stuck where you can't get to it! Anyway somewhere between the idle control unit and the Lambda unit I have a short.

Stupid question but where can I find the lambda unit on a 380SL.

Thanks,
Michael
69 280SE Coupe
61 220SEb
66 300SE cab
91 300SEL

friends 380SL

Passenger footwell under the carpet.

Thanks!
 

Found the Lambda unit hidden in the floor. Rewired to the relay and now the idle control unit works correct and the 380SL has a nice 750rpm idle and no hisitations what so ever.

Thanks again

Michael

Uh, actually it should be 750 until about 40 degrees water temp, when the temp sensor in the back of the right head switches from 12 to 0 V output and the idle then drops to 450-500. This is on an '81.

You might want to check if you are getting into closed loop.