Mercedes-Benz W164 (M-Class ML 2005–2011 and GL X164): common faults, maintenance guides and repair tips.
Often the cause is the gearbox conductor plate or its speed sensor, so the control unit does not get reliable speed data. Switching the car off resets...
In the 7-speed 722.9 gearbox, slipping is often caused by a fault in the torque converter (turbine) or the oil pump. Clogged screens in the valve body...
The most common cause is the turbo boost pressure actuator, the unit that controls the turbo. Fault code 2510 points to the actuator, not the sensor, ...
A common cause is carbon deposit that jams the valve stem. The car then runs poorly and the engine warning light comes on. The valve should be cleaned...
Typical causes are poor contact in the compressor connector, damp desiccant or a clogged filter, a stuck pressure relief valve and a loose compressor ...
The most common causes are a cracked or worn air spring and a leaking O-ring between the shock absorber and the air spring. The fault often shows as o...
The most common leak point is the tail light seal, which can leak even if the light has not been removed. Water runs onto the tailgate lift motor and ...
A typical symptom is vibration or knocking while driving when the rubber of the support bearing has torn or come loose. If the car rumbles, check both...
Yes. The transfer case chain has no tensioner, so a stretched chain can jump and rattle under hard throttle. A loose chain guide can also roll around ...
Yes. A high-pitched hum or vibration at highway speed is a typical wheel bearing symptom. A bearing can also fail without giving any sign while drivin...
The cause can be a fault in the glow relay, i.e. the glow plug control unit, even if the glow plugs have been replaced. A faulty glow plug can also da...
Measure the charging voltage: it should be clearly above 14.0 V. The cause can be a poor connection between the alternator and the battery. Charging m...
Start with the high- and low-side pressures of the refrigerant circuit, which must be within the reference values. Then check that the auxiliary fan a...
The front axle takes MB approval 235.7 or 235.74. A rear axle with a locking differential requires 235.15, one without a lock 235.7. Oil without a Mer...