Mercedes-Benz 300E 4MATIC Repair and Maintenance

A guide to problems, costs, maintenance and repair for your Mercedes-Benz 300E 4MATIC

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Mercedes-Benz 300E 4MATIC 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.

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.

Cracked Driveshaft Flex Discs May Cause Driveshaft Movement/Vibration

A vibration felt through the center floor of the vehicle can be caused by driveshaft flex discs, which crack and shred, causing excessive driveshaft movement. Not repairing these can cause damage to the driveshaft center support bearing, or, in the worst case scenario, damage to the transmission or differential.

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Mercedes-Benz 300E 4MATIC Questions

Why is my transmission fluid reservoir not able to hold or maintain any fluid? (2 answers)

After filling with trans fluid, I start engine, begin to drive and notice a great deal of smoke coming out of the exhaust pipes. After 10 minutes of the burning smoke, I turn the engine off and measure the transmission dipstick. It measures empty. This problem has been happening with regularity. ...

blinking red light on a air circulation button and it cut the heating blower off (1 answer)

I have a 1992 300e 4Matic and when the blinking red light comes on the air circulations button it cuts off the heat and cuts the engine off when come to a stop. What could be the problem. Please help. Thanks, Rith.

does anyone know what my temperature gage is suppose to rage around (1 answer)

Gage temperature suppose to be before it starts overheatin

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