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Problems for specific Mercedes-Benz 350SD years:

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Most reported 1991 Mercedes-Benz 350SD problems

 

Verified for the Mercedes-Benz 350SD

Power steering hoses and components can develop leaks.

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On high mileage vehicles, rear spring wear may cause the rear end to sag.
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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.

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Verified for the Mercedes-Benz 350SD
The expansion valve can get stuck and is difficult to replace.
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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.

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Oil leaks can develop around the oil filter housing.
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Verified for the Mercedes-Benz 350SD
Fuel leaks can develop around the high pressure fuel injection pump.
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Verified for the Mercedes-Benz 350SD

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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Verified for the Mercedes-Benz 350SD

The fuel pump and/or fuel pump relay can fail, causing the car to crank over but not start. Proper diagnoses will be necessary to confirm if the pump or relay is at fault.

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Verified for the Mercedes-Benz 350SD

Other than a defective motor, a bad switch or blower motor resistor assembly can cause an inoperative heater blower motor.

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High mileage vehicles may develop a transmission fluid leak from one or more of the oil seals.

 

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The climate control system can fail or perform erratically due to internal problems with the climate control button electrical contacts. Replacement of the climate control assembly is commonly required to correct this problem.

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Verified for the Mercedes-Benz 350SD

A worn steering dampening shock can cause a fluid leak at the front of the vehicle. If a leak is noted from the dampening shock, our technicians tell us that it should be replaced.

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Verified for the Mercedes-Benz 350SD

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).

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Verified for the Mercedes-Benz 350SD

One or more door windows may stop working due to a failed window regulator. Replacement of the failed regulator will be necessary to correct this concern.

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