Mercedes-Benz 400E Repair and Maintenance

A guide to problems, costs, maintenance and repair for your Mercedes-Benz 400E

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Mercedes-Benz 400E Problems

Erratic Engine Operation and Poor Fuel Economy Due to Faulty Mass Air Flow Sensor

A faulty mass air flow (MAF) sensor can cause erratic/rough engine operation and fuel economy issues. Since this sensor measures the actual amount of air entering the motor, when it fails, the engine control module (ECM) takes the wrong information and delivers incorrect volume of fuel to the cylinders.

Emissions-related ports in cylinder head may clog

Ports in the cylinder head related to the emissions air injection and EGR systems can clog; the cylinder head should be removed and the ports cleaned.

Cracked Driveshaft Flex Discs May Cause Driveshaft Movement/Vibration

A vibration felt through the center floor of the vehicle can be caused by cracked and/or shredded driveshaft flex discs, resulting in excessive driveshaft movement. If not repaired, damage to the driveshaft center support bearing, transmission, or differential can occur.

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Mercedes-Benz 400E Recalls

Recall 94V004000
HIGH AMBIENT ENGINE COMPARTMENT TEMPERATURES ARE EXPERIENCED AFTER THE VEHICLE IS OPERATED AND THEN PARKED. IF THE VEHICLE IS RESTARTED A SHORT TIME LATER AND THE CHARCOAL CANISTER IS SATURATED WITH FUEL, IT IS POSSIBLE THAT FUEL VAPOR MAY BE EXPELLED THROUGH THE INLET VENT LINE OF THE CANISTER O...
Recall 92V083000
THE PLASTIC BRAKE HYDRAULIC HOSE FROM THE AUTOMATIC SLIP CONTROL UNIT WAS MISROUTED TOO CLOSE TO THE PRE-RESISTOR FOR THE ELECTRIC AUXILIARY ENGINE COOLING FAN WHICH BECOMES HOT UNDER CERTAIN CONDITIONS. THIS COULD CAUSE THE HOSE TO MELT AND LEAK BRAKE FLUID ONTO THE HOT PRE-RESISTOR.

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Mercedes-Benz 400E Reviews

These cars are amazing and mine is in immaculant condition having 142k miles and its a 1992 400E. They run and drive excellent and have low maintenance even for its age! Definitely recommend this auto
I just bought it after hitting a deer and totaling my 300E. The A/C doesn't work. It's quite a car but climate control has not been their best effort. It has aftermarket shocks. I want my Bilsteins back.

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