On the above-mentioned vehicles, the control lamp, which signals the failure of a bulb (light bulb) may suddenly light up. A visual inspection of the lighting equipment on the vehicle, however, does not reveal any defect.

In the above-mentioned vehicles, it may be possible that the engine starts poorly or not at all. The engine control lamp and/or the preheater control lamp will light up in this process. An engine power loss can be observed at the same time. Fault codes P062B and 20EE may be stored in the fault memory.

During an engine's combustion cycle, the rotary movement of the crankshaft is sped up and slowed down This rotational irregularity is transferred to the accessory drive as a result of the alternator's moment of inertia.

If the above-mentioned defect is detected, it may be related to a defect in the vacuum system responsible for controlling the vacuum actuator (Fig. 1).

If the error message "SCBS / City emergency stop assistant forward gear malfunction" is displayed on the instrument cluster on the vehicle models mentioned above, one cause for this may be a defective boost pressure sensor.

If a defect is detected in the starter or starter motor on the vehicle models mentioned above, a possible cause may be a defective ignition lock.

Signal lights have an important safety function. They demonstrate deceleration and a change in direction of the vehicle, and make the vehicle more visible to other road users when it is dark or during poor visibility.

The vehicles mentioned above may vibrate and make noise when accelerating, braking or starting. The knocking sounds are perceived as coming from the engine compartment.

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In the vehicles mentioned above with air conditioning, the air flow from the air outlet nozzles may be impaired. Possibly the air flow to the footwell is permanently present and/or the air flow at the dashboard nozzles is insufficient.

If this defect is detected in the vehicle model mentioned above, a possible cause could be a defective connector on the body computer in the front left footwell.

Since an internal combustion engine cannot start by itself, a functioning starter is essential for a roadworthy vehicle. Malfunctions can be caused, for example, by incorrect connections, faulty solenoid switches or a damaged single-pinion gear.