The lambda sensor determines the remaining oxygen content in the exhaust emission, and provides the engine control with an electric signal to control the air-fuel ratio. Scroll through this page and find out about the variants, how they work, test methods, and important information on the correct replacement of lambda sensors.

The noise may occur when manoeuvring the vehicle. The cause was diagnosed as unwanted friction between the front suspension strut and the shock absorber bump stop.

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If the engine-check lamp lights up on the vehicles mentioned above and the error code P0603 is stored in the error memory, there are various possible cause. As a first measure, all system-relevant electrical components, including the power supply, electrical connections and ground points should be checked.

In order to remedy the problem, the error memory of the air-conditioning/heating control unit should be read out. If the error code refers to a mechanical error (e.g. B10BE07), a defect of the blower motor could well be the cause.

The pump generates the hydraulic pressure required by the power steering system to make the vehicle easier and more comfortable to steer during driving. When the engine is running and the steering wheel is in the "straight ahead" position, the pump constantly conveys the hydraulic oil through the steering and back again into the expansion tank.

To access the cabin filter on the vehicles mentioned above, proceed as follows:

• Remove the side panel (passenger side) of the dashboard 
• Unclip the panel on the dashboard (above the glove box) 
• Unscrew the screws of the glove box

On the vehicles mentioned above, non-specific, knocking or clicking noises may occur from the vehicle rear area. These are particularly noticeable when starting off or when changing from forward to reverse. Excessive play between the rear wheel bearing and the drive shaft is a possible cause.

On the vehicles mentioned above, the vehicle may pull to one side even though the steering wheel is in the straight-ahead position.

Light on the road is going digital. This means that, in future, light distributions will be brought about primarily by means of digital control of high-resolution light modules. As a result, new and diverse application possibilities come into play, one of which would be, for example, the ramping up of road safety.

On the vehicles mentioned above, the left fog lamp may light up permanently. Error code A98F (error left fog lamp) is stored in the multifunction control unit. The cause may be a fault in the fuse box (relay plate 1) in the engine compartment.

On the above-mentioned vehicle, the “check engine” lamp or the SCR control lamp may suddenly light up while the car is being driven. The warning message appears in the instrument cluster: "Engine start in 100 KM no longer possible". At the same time, the error code P20EE (SCR exhaust gas treatment) is stored in the engine control unit.