After about 5 weeks of possession of the thick one I now have to report about a problem. I only found it quite rarely, but the more I got to know the vehicle found out that when driving under the road between 1200 and 1500 revolutions I then gave the gas a strange rumble and partly also perceived noises under the car. I can even reproduce it by now. It’s like @wormchen described it in another Threat. n has quote: Is there also a fluctuation of the tachometer during the tachometer? Does the tachometer feel like you drive over small, short, following ground waves, as they occur at intersections? Quotation end. That’s exactly what I have to confirm. Only I drive a petrol V8 with now 128,000 km. Should it actually be the gearbox? That wouldn’t be funny. How do I go now? Have bought a guarantee. But I don’t think the T 60% of the material of a transmission repair will probably still be quite a lot of money. After all, I still have a guarantee and it is actually the case that I had already noticed this rumbling on the pick-up trip from Hannover to Berlin. Only I couldn’t classify it at the time. How do I proceed now? Greeting Carsten