1992 Mercedes-Benz 300E Repair and Maintenance

A guide to problems, costs, maintenance and repair for your 1992 Mercedes-Benz 300E

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1992 Mercedes-Benz 300E Problems

Rough Running Engine Due to Misfire

A rough running motor or lack of power can be caused by a failed distributor cap or rotor, ignition wires (or their resistors), or valve cover gasket leaks. If the valve cover gasket leaks, oil can pool where the ignition wire resistor connects to the spark plug. The resistor can fail and the spark plug may not fire because of a short circuit through the oil.

Failure of EHA valve may cause fuel/engine problems
Fuel leaks, erratic or rough engine operation, and fuel economy issues can be caused by the failure of a fuel system component called the EHA (electro-hydraulic actuator) valve.
Improper Temperature Output From HVAC

One or more blend door vacuum actuators may fail resulting in the incorrect output temperature from the HVAC system. Failed actuators will require replacement to restore proper HVAC operation.

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1992 Mercedes-Benz 300E Questions

how do you turn on the windshild washer? (1 answer)

why wont the trunk open? (1 answer)

i can turn the key of the trunk and lock or open the car doors but the trunk will not open

check engine light inop, bulb good, unable to pull codes on box by the battery (1 answer)

failed smog test; failed obd system checks-because light doesn't come with key, hc=282/max allowed=56 @25mph, co=1.62/max allowed=.39@25mph. already replaced the oxygen sensor and catalytic converter prior to the test. cars hard to start cold, once started runs a little rough for the first mi...

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1992 Mercedes-Benz 300E Reviews

I own a Mercedes Benz 300e that I bought for my wife for $1700. At that point it had 249,000 miles on it. Before we owned it, it had been sitting for some years and had a acceleration delay issue. Once we got it back on the road I added fuel injector cleaner and drove it hard on the highway. Now the issue only appears before its fully warmed up to operating temperature. She did not want it bac...
I've had my 92' 300E with the 3 liter engine for close to 15 years now and it now has 248,000 miles on it. I’ve only had the standard repairs to perform for a car of this age (radiator, alternator, belts) all self repaired/replaced. The only small annoyance is the need to add oil, about 2 quarts/month, but I've accepted it. The car still runs strong and rides well. It’s getting close to time fo...
Car is very dependable when it's running. Strong engine at 170K miles, but I do find that it has a problem with the air conditioner sometimes blowing and sometimes not. It happens quite frequently. I also have noticed that it leaks transmission fluid if it sits for more than a week or so. Those are the two problems that I have encountered with this vehicle at this juncture. I love the way ...

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