Service Information: Engine output increase

 With the spread of supercharged gasoline and diesel engines with electronic control units, the accessory industry has increased its efforts to further increase the power and torque of the engines by means of chip tuning.

This has resulted in increasing damage profiles when analyzing guarantee claims. We would therefore point out at this point that nothing has changed in the rejecting posture of our company towards such modifications. The layout of the individual components in the engine management and drive train have been matched to one another for maximum comfort and durability and are specified in the model approval process. Any subsequent modifications to the vehicle of this type or use of parts from other companies which have not been tested and approved reduce the safety reserves provided by the manufacturer.

 This leads to invalidation of the operating permit for the affected vehicle. Furthermore, warranty claims may be rendered invalid if damage has (partly) been caused by performance tuning measures. Moreover, performance tuning constitutes so-called product misuse, which may also result in invalidation of the manufacturer's product liability.