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2009 Mercedes-Benz ML350 Problems

Find the most common issues based on 2009 Mercedes-Benz ML350 owner complaints.
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Most Common 2009 Mercedes-Benz ML350 Problems

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 the ...
Vehicles equipped with a 7-speed automatic transmission may develop a rough shifting condition, most commonly going up from first to second gear and going down from third to second or second to f...
The brake light warning message for a burned out bulb may be displayed. Our technicians tell us the tail lamp housing may melt and distort causing a poor connection at the bulb. The lamp housing sh...
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1 Known 2009 Mercedes-Benz ML350 Brakes Problem

Brake pad life varies and is dependent upon driving style and terrain. Because of the weight of this vehicle, brake pad life is very short. If driving aggressively, one can expect a life of about 8...

3 Known 2009 Mercedes-Benz ML350 Drive Train Problems

Vehicles equipped with a 7-speed automatic transmission may develop a rough shifting condition, most commonly going up from first to second gear and going down from third to second or second to f...
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...
High mileage or older vehicles commonly develop leaks from the differential seals and/or cover. Our technicians recommend a complete reseal of the differential unit whenever these leaks are repaired.

5 Known 2009 Mercedes-Benz ML350 Electrical & Lights Problems

The brake light warning message for a burned out bulb may be displayed. Our technicians tell us the tail lamp housing may melt and distort causing a poor connection at the bulb. The lamp housing sh...
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 keys wi...

6 Known 2009 Mercedes-Benz ML350 Engine Problems

The camshaft adjuster solenoid (which is related to the variable valve timing system) may fail or timing chain/balance shaft components may wear, resulting in illumination of the Check Engine Light...
The engine may develop a stalling and/or no start condition due to a failed crankshaft position sensor.
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.

2 Known 2009 Mercedes-Benz ML350 Exhaust & Emissions Problems

As the spark plug wires age and are exposed to heat cycling, they start to develop micro cracks in the insulation around the resistors, which causes misfires and poor fuel economy.
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.

2 Known 2009 Mercedes-Benz ML350 Heating & Air Conditioning Problems

After a heavy rain storm, the drains for the heating, ventilation and AC (HVAC) system intake can be plugged with leaves and other debris, causing a dead battery. Water fills the intake cavity and ...
The heater blower motor can become abnormally noisy. Replacement of the blower motor is commonly necessary to correct this concern.

0 Known 2009 Mercedes-Benz ML350 Maintenance Problems

3 Known 2009 Mercedes-Benz ML350 Miscellaneous Problems

The tailgate latch may stick causing a drain on the battery while the vehicle is parked.
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...
Bolts that connect the automatic tailgate actuator lever to the tailgate can break. The broken bolts need to be drilled out and the holes re-threaded before a new bolt can be installed. If you he...

4 Known 2009 Mercedes-Benz ML350 Suspension & Steering Problems

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 the ...
A problem with the ball joints can cause a creaking noise. There is an updated part to remedy this problem.
The power steering reservoir designed for the 2006-2014 Mercedes Benz ML350 commonly leaks power steering fluid causing a screeching sound when turning the steering wheel, especially when the vehic...

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Known 2009 Mercedes-Benz ML350 Problems & Complaints

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 the ...
The brake light warning message for a burned out bulb may be displayed. Our technicians tell us the tail lamp housing may melt and distort causing a poor connection at the bulb. The lamp housing sh...
The tailgate latch may stick causing a drain on the battery while the vehicle is parked.
Vehicles equipped with a 7-speed automatic transmission may develop a rough shifting condition, most commonly going up from first to second gear and going down from third to second or second to f...
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.
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...
The camshaft adjuster solenoid (which is related to the variable valve timing system) may fail or timing chain/balance shaft components may wear, resulting in illumination of the Check Engine Light...
After a heavy rain storm, the drains for the heating, ventilation and AC (HVAC) system intake can be plugged with leaves and other debris, causing a dead battery. Water fills the intake cavity and ...
The engine may develop a stalling and/or no start condition due to a failed crankshaft position sensor.
When starting the engine after sitting for several hours, a knocking sound may be heard for several seconds. This is a common issue with the 2006-2010 Mercedes Benz ML350. There are three common pr...
The power steering reservoir designed for the 2006-2014 Mercedes Benz ML350 commonly leaks power steering fluid causing a screeching sound when turning the steering wheel, especially when the vehic...
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.
The 2006-2012 Mercedes Benz ML350 may have engine oil seeping or leaking from the back of the cylinder heads. This is commonly misdiagnosed as leaking valve covers. On the back of the cylinder hea...
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.
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