If the indicated performance or fuel efficiency gains are not met, the purchaser must notify GÄN Tuning Büro within fifty (50) days from the day he or she received the product to get a refund. These may, for example, be caused by standard factory model variations, the quality of the fuel used, the maintenance and ageing condition of the vehicle or the driving habits. Deviations upwards and downwards are possible.
The indicated performance gains and fuel efficiency gains are target values. The installation of an additional control unit to enhance performance requires a separate, paid inspection to be carried out by an official test facility. There is currently no technical report for the selected model.
the increase in performance must be recorded in the vehicle documents if the vehicle is to be used in road traffic in accordance with road traffic regulations (StVO). The installation of an additional control unit is considered a structural change and must therefore be inspected and approved by an official test facility (for example, TÜV, DEKRA or KÜS) in accordance with Section 19 of the German regulations authorising the use of vehicles for road traffic (StVZO), and confirmed in accordance with Section 22 StVZO, i.e. Upward or downward deviations may occur due to for example, standard changes to factory model, the quality of fuel used, the technical condition of the vehicle, the aging of the vehicle, or a change in driving style. The specified values for performance enhancement and fuel efficiency are target values.
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