I have done a thourough search on the topic and saw the info on duty cycles, etc. My question is, what is the lambda adjustment, what does it do, and what is a "duty cycle" My 1990 300E smells like it is running rich even when warm, and I am wondering how to diagnose if it really is. Thanks!

Don

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Don Drake

1990 300E 125k Miles
1994 S420 100k Miles