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1991 Mercedes-Benz 190E Problems

RepairPal has identified the most common problems with the 1991 Mercedes-Benz 190E based on complaints from actual vehicle owners. We'll tell you what the problem is and what it'll take to fix it.

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29
Known Problems

On high usage vehicles, the ignition lock may become difficult to turn due to wear of the ignition lock and tumblers. Replacement of the ignition lock cylinder will generally be required to correct this concern.

The tie rod ends, idler arm, and/or drag link components of the steering linkage may wear prematurely. Please keep in mind the wheel alignment should be checked and adjusted when any of these items are replaced.

The brakes may begin to squeak at about the 50 percent wear point. This is due to the size and material used for the brake pads and rotors.  The brake rotor surfaces become uneven, causing a lip to form at the outer edge. This will generally require replacement of the rotors when the pads are worn (pad life varies depending on driving style and terrain).

Leaks may develop from the differential seals and/or cover on older or high mileage vehicles. Our technicians recommend a complete reseal of the differential unit when these leaks are addressed.

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.

As brake fluid becomes dirty over time, it can cause a failure of the anti-lock brake system (ABS) modulator assembly. Our technicians recommend a complete brake system flush every two years to help prevent this issue.

The expansion valve can get stuck and is difficult to replace.

A power steering fluid leak may develop from the power steering pump or the steering gearbox. Additionally the steering shock (damper) could leak its own internal fluid. Leaking components should be replaced to restore proper power steering operation.

Valve stem seals may wear and cause the engine to burn oil. this can contaminate the catalytic converter and cause it to fail.

A leaky heater valve may cause a coolant leak in the rear of the engine compartment.

The AC system may not blow cold air due to Refrigerant leaks from AC manifold hoses. Leak diagnoses, most commonly using leak detection dye, may be necessary to determine the exact location of any leaks.

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.

The dashboard is known to crack in hot climates.
The part that attaches the distributor rotor to the camshaft can break; the starter will still crank, but the engine will not start.