2002 Mercedes-Benz E430 4MATIC Repair and Maintenance

A guide to problems, costs, maintenance and repair for your 2002 Mercedes-Benz E430 4MATIC

2002 Mercedes-Benz E430 4MATIC Problems

Replace air filter when replacing failed mass air flow sensor

The mass air flow sensor tends to fail causing poor fuel economy and Check Engine light illumination. The engine air filter should be replaced when the mass air flow sensor is replaced; a dirty filter can allow debris to damage the new sensor.

Oil May Leak From PCV Vent Housings and Inspection Plates

An engine Oil leak may develop from the PCV vent housing on the valve cover and/or the inspection plate on the front of the engine.

Malfunctioning Regulators May Cause Blower Motor Failure

A malfunctioning HVAC blower motor regulator can cause the blower motor to operate below the requested speed or not at all. Updated regulators are available; the blower motor and cover need to be replaced at the same time to upgrade the system.

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2002 Mercedes-Benz E430 4MATIC Questions

motor mount on left side is broken or loose (3 answers)

Had a bad experience with mechanic. Claimed the heads cracked resurfaced them. When he returned car a vibration under hood, we looked and when you put foot of gas left side of engine lifts up out of the car

The car is very noisy at highway speeds. Is that normal? (2 answers)

The whining noise occurs at highway speeds (45mph and faster). Seems to be coming from wheels.

Do you think my thermostat is bad? (2 answers)

My veh temperature gage will rise quickly when the veh is idled in traffic. The fans do NOT come on to cool the vehicle either. Could this be a result of the thermostat being bad? The vehicle recently had repairs to the front end as well.

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