Blink code help request - 1988 300ce.
 

1988 300CE CEL on: #4 light blinks 5 times. I've scoured Tech Help and can't find any clue. Suspect O2 sensor, as exhaust is very rich smelling.

Thanks for any assistance.

Try this link and see if you find what you're looking for.
http://www.mbslk.de/files/artikel/r170_fehlercodes.pdf

Thanks for the good info, lsmalley. Based on the code book link you provided, I bought a Bosch O2 sensor and installed it last night. CEL is now off, and the exhaust smells like it could pass emissions tests again. Start up is now immediate and the m103 settles into a solid idle at ~650.

Solving a CEL for <$100 makes me happy!

Where do you get the build or buy information to get a code reader for the Mercedes that didn't have the factory test module with the red light already there. Oh! Not trying to high jack the thread.

you are welcome......now if I can just clear my own CEL. :confused:

Answer
 

Post#5 in the following link. :D


560SL diagnostic port/tool
http://www.peachparts.com/shopforum/mercedes-benz-sl-discussion-forum/203716-560sl-diagnostic-port-tool.html






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