I've done a search and can't find the code list from about 4 years ago that I saw posted. I can't even remember who posted it. My '91 300SE has a box on the passenger side firewall with an LED that flashes the codes for the check engine light. I can reset it here too and light goes out, does anyone have the code list, so many flashes means a particular problem. This is in a 91 126 not a '92 as someone thought back then.

Wonderful car I have, I'm just fixing the things that have worn out over the last 16 years, it will still run over 125 MPH (only second time I've done that) and the A/C still works.

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1991 300SE (my ride, 279,000 miles, looks almost new
1954 Cadillac (21 yo son's car, he bought when age 15)
1972 SeaBird 19 ft runabout (old but solid, slant six, Volvo sterndrive perfect condition, undergoing complete overhaul and refit)
1998 Toyota Rav4 (my sons daily driver when he is in the Continental US, PROUDLY serving in US Navy)