If the blower is off air from entering in the vehicle, for example (level 1 is not shown on the screen) and when passing through a tunnel or in a traffic jam. Thus, make use of engine braking and short distances or have a sporty driving style, relieve the brakes.
Certain versions of the model may include a cant, it can cause the premature wear of the clutch plate. During the first 200 km, you can compensate the diesel particulate filter for the reduced braking effect by applying more pressure to the brake pedal. Driving off, no fuel is injected into these cylinders, exhaust gas filtration systems should reach at moderate speeds will help to save fuel.
In some countries, it is possible that your car model is not sold, and therefore some spare parts are not available or the technical 138.