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Mercedes-Benz ML320 Problems

Find the most common issues based on Mercedes-Benz ML320 owner complaints.
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Most Common Mercedes-Benz ML320 Problems

Electrical switches in the door latches can fail, causing the door locks to rapidly actuate up and down multiple times when the locks are activated by either the keyless remote or door lock switc...
A no start condition may develop due to an anti-theft system fault. If the drive authorization module fails to recognize the keys, the engine will not start. In many cases, a new module and key...
The ESP and BAS warning lights may illuminate due to a failed brake light switch. Replacement of the failed switch should correct this concern. A recall on certain 2000-2002 models have been recall...
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1 Known Mercedes-Benz ML320 Brakes Problem

Pad life varies and is dependent upon driving style and terrain. One common problem our technicians report is that motorists will drive with the parking brake applied; this burns up the parking bra...

3 Known Mercedes-Benz ML320 Drive Train Problems

The electrical connector at the automatic transmission may leak fluid. Over time leaking fluid could migrate through the wiring harness and damage the transmission control module. If that happe...
Due to slipping clutches in the transfer case, a shudder or rumbling from the center of the vehicle may occur, especially when turning at slow speeds. If the clutches are not too badly worn, changi...
Leaks may develop from the differential cover and/or seals on high mileage or older vehicles. Our technicians recommend a complete reseal of the differential unit if these leaks are addressed.

5 Known Mercedes-Benz ML320 Electrical & Lights Problems

A no start condition may develop due to an anti-theft system fault. If the drive authorization module fails to recognize the keys, the engine will not start. In many cases, a new module and key...
The ESP and BAS warning lights may illuminate due to a failed brake light switch. Replacement of the failed switch should correct this concern. A recall on certain 2000-2002 models have been recall...
The power window switch may fail and the windows will not raise. The main switch at the front center console is commonly at fault. A failed switch will require replacement.

5 Known Mercedes-Benz ML320 Engine Problems

The crankshaft position sensor may fail. Symptoms of this are: The engine will crank—but not start—especially when the engine is warm. The car may start again if it is left to cool ...
Motor mounts commonly fail, causing engine vibrations to be transferred to the body. Failed motor mounts should be replaced in order to prevent damage to the transmission mount.
Oil leaks can develop around the oil filter housing.

5 Known Mercedes-Benz ML320 Exhaust & Emissions Problems

An exhaust leak may develop due to cracked welds on the front catalytic converter. Replacement of the catalyst is recommended; re-welding of the catalyst is discouraged because it is an emissions d...
The mass air flow (MAF) sensor tends to fail. 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.
Up to model year 2000, a low-volume fuel filter was used. An updated fuel filter must be retrofitted to prevent premature fuel pump failure.

2 Known Mercedes-Benz ML320 Heating & Air Conditioning Problems

AC system leaks and/or a faulty evaporator temperature sensor can cause poor AC cooling. The failed sensor can prevent the AC compressor from coming on. Leaks cause a low refrigerant level, which r...
The heater blower motor can become abnormally noisy. Replacement of the blower motor is commonly necessary to correct this concern.

0 Known Mercedes-Benz ML320 Maintenance Problems

7 Known Mercedes-Benz ML320 Miscellaneous Problems

Electrical switches in the door latches can fail, causing the door locks to rapidly actuate up and down multiple times when the locks are activated by either the keyless remote or door lock switc...
Door mounted storage pockets can become unglued and fall into the door.
The arms for the sunroof wind deflector may break; if the broken pieces are not removed, they can jam the sunroof.

3 Known Mercedes-Benz ML320 Suspension & Steering Problems

The power steering return hose may leak at the radiator cooler fitting. If the clamp is not properly tightened, the hose can blow off, causing increased steering effort and a mess under the hood.
It is not uncommon for the power steering rack to develop a fluid leak requiring replacement of the rack assembly. Loss of power steering fluid may also cause an abnormal noise and damage to th...
These vehicles have torsion bar-type springs for the front suspension. If the vehicle appears to be lower on one side (in front), the hard plastic insulator for the torsion bar may have cracked and...

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Known Mercedes-Benz ML320 Problems & Complaints

A no start condition may develop due to an anti-theft system fault. If the drive authorization module fails to recognize the keys, the engine will not start. In many cases, a new module and key...
Electrical switches in the door latches can fail, causing the door locks to rapidly actuate up and down multiple times when the locks are activated by either the keyless remote or door lock switc...
Release cables for the rear seat (second row of seats) tend to stretch or break requiring replacement.
The ESP and BAS warning lights may illuminate due to a failed brake light switch. Replacement of the failed switch should correct this concern. A recall on certain 2000-2002 models have been recall...
It is not uncommon for the power steering rack to develop a fluid leak requiring replacement of the rack assembly. Loss of power steering fluid may also cause an abnormal noise and damage to th...
The heater blower motor can become abnormally noisy. Replacement of the blower motor is commonly necessary to correct this concern.
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.
Various electrical problem may develop due to a failed "all activity module". Our technicians tell us that proper diagnoses is required to be sure any electrical faults are being caused by the fa...
Due to slipping clutches in the transfer case, a shudder or rumbling from the center of the vehicle may occur, especially when turning at slow speeds. If the clutches are not too badly worn, changi...
Motor mounts commonly fail, causing engine vibrations to be transferred to the body. Failed motor mounts should be replaced in order to prevent damage to the transmission mount.
The mass air flow (MAF) sensor tends to fail. 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.
The crankshaft position sensor may fail. Symptoms of this are: The engine will crank—but not start—especially when the engine is warm. The car may start again if it is left to cool ...
The rubber bond in the harmonic balancer can decay, which causes the balancer to move and work its way toward the timing cover. If the balancer comes into contact with the timing cover while the ...
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