Kan me niet voorstellen. Heb het over A7 en niet Q7 ;-)... A7 biturbo heeft het ook. Lijkt me dan toch kwestie van actuator installeren en gaan?!
Sound actuator
Thanks to an innovative actuator in the auxiliary channel of the exhaust system, the BiTDI A6 and A7 Sportback models don't sound like they should be capable of such level-headed economy figures. The actuator system essentially consists of a speaker which imposes a defined oscillation pattern on the exhaust flow and transforms the typical TDI exhaust note into a more sonorous roar that is closer to the output of a high-performance petrol engine.