1996 Mercedes-Benz C220 Q&A
1996 Mercedes-Benz C220 Question: Im trying to smog the vehiche but there are 3 tests obd2 isnt performing.
have a mech scan it for poss pending codes and also live data to determine cause of monitors to not reset - globalhelper
I had the same problem and was able to solve it by replacing the overload protection relay (part #0005406745) which sells on Autohausaz.com for $20 or $55 depending on which manufacturer you choose to go with. Solved my problem and I bet it would solve yours. - benzman100