If the engine on the vehicles mentioned above stalls after starting or does not run smoothly when cold, a leak in the intake area may be the cause.

If non-specific noises occur in the area of the A-pillar or instrument panel on the vehicles mentioned above, they may be caused by the bonnet rubber stoppers.

On the above-mentioned vehicles, bulbs for halogen headlamps can be replaced as follows...

Headlamp cleaning systems improve visibility in the dark and prevent dazzling of oncoming traffic through stray light. On this page, find out about the structure of headlamp cleaning systems and how they work.

The ABS/ESP control lamp may light up sporadically on the above-mentioned vehicles. Error codes such as U0077, U0073, U0401 are stored in the error memory of the control unit.

Faulty injection valves could be a possible cause. After visually inspecting the wiring harness and plug connections, the fault memory of the engine control unit should be read out and deleted if necessary.

Vehicles equipped with an electromechanical parking brake can be set to maintenance mode as follows.
Before the brake pads on the rear axle brake callipers can be replaced, the electric actuator motors must be retracted.

Injection valves provide each cylinder with the required fuel and simultaneously atomise the fuel so that it can burn most effectively in the combustion chamber. Scroll through this page and find out how injection valves work and potential fault symptoms.

If the performance of the air-conditioning system is inadequate when outside temperatures are high, a faulty evaporator temperature sensor (see illustration example) may be the cause. Incorrectly measured values can cause the evaporator to freeze and block the air flow.

If the fault mentioned above is detected, it may be in connection with the triggering of the fuel cut-off switch. A fuel cut-off switch is installed in this vehicle. The switch is triggered in the event of a sudden change in the vehicle's position and if any strong vibrations occur.

The following problem is observed on the vehicles mentioned above. During navigation, the display may malfunction (e.g. delayed image display).

The primary task of the exhaust system is conducting the combustion gases of the engine past the driver's cab into the open air. Noise caused by combustion is reduced to the permissible volume by integrated mufflers.