We don't have a lot of complaints on file for the Mercedes-Benz 300E (although feel free to add yours here) -- probably because it's so old, no one bothers to post complaints anymore.
The 1987 Mercedes-Benz 300E has the most complaints, & the most-reported problem is also with the 1987 300E for erratic transmission behavior.
Worst Reported Problems with the 300E
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Latest Owner Complaints About the 300E
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catalytic converter bad -- 1989 300E:
Two major problems in a six month period at 116K miles. Read more »
This problem has been reported 1 times by other 1989 300E owners.
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cylinder head needs rebuild -- 1989 300E:
This old car has had quite a few things go wrong. Catalytic Converter and Valve Job were expensive and should not have gone bad at 116K Read more »
This problem has been reported 1 times by other 1989 300E owners.
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erratic transmission behavior -- 1987 300E:
This car was exceptionally clean for being 17 years old, which speaks volumes about how it was treated. With only 108,000 original miles, the transmission began having problems. I would be driving down the road, whether cruising or accelerating it didn't matter, and the transmission would slip ... Read more »
This problem has been reported 1 times by other 1987 300E owners.
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illuminated oil pressure light -- 1987 300E:
The oil was always clean and topped off. No burning oil issues. For some reason the oil pressure light would illuminate. I assume the problem to be faulty electronics. The oil pressure gauge showed full pressure when the light was illuminated. I was spending so much time and money getting other ... Read more »
This problem has been reported 1 times by other 1987 300E owners.
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cruise control not working -- 1987 300E:
The cruise control was totally inoperable. After much online research, I self-diagnosed the problem as a failed cruise control module. I ordered a new unit online, installed it relatively easily, and it fixed the problem. Cruise control worked great after that. Read more »
This problem has been reported 1 times by other 1987 300E owners.