1991 Mercedes-Benz 300E 4MATIC Repair and Maintenance

A guide to problems, costs, maintenance and repair for your 1991 Mercedes-Benz 300E 4MATIC

1991 Mercedes-Benz 300E 4MATIC Problems

Blend Doors in HVAC May Stop Working Due to Bad Vacuum Actuators

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.

Leaks Develop at Differential Seals/Cover on High Mileage/Older Vehicles

High mileage or older vehicles commonly develop leaks from the differential seals and/or cover. Our technicians recommend a complete reseal of the differential unit whenever these leaks are repaired.

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1991 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. ...

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

Gage temperature suppose to be before it starts overheatin

path of the serpentine belt (1 answer)

I cannot seem to figure out the path to re-intall belt.

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