In June I sold a 2.5 year old WoMo, which I had in the rental, as a commercial seller in Germany to another buyer, also commercially (he wanted so because of the tax). In the purchase contract for tightness and body is pointed out the warranty of the manufacturer (7 years tightness, 5 years rust, 4 years warranty extension on technology) and any further warranty AND warranty excluded. ll, as well as leak check one day before the transfer, as well as new TÜV. Purchase price: 80,000EUR net. The WoMo was top in shot, service always carried out, leak check also, even an extra after the sale and before the transfer. Certificate available. Before Christmas the lawyer of the buyer contacted me and sent an invoice over 25,000EUR with payment deadline 3 days, today was already the reminder in the mail. The reason: The camper is allegedly in the rear area about the beds were totally lazy. The reason is a water break due to the allegedly not professionally mounted cable introduction of the Sat system. The plant was installed ex factory, WoMo was picked up at the plant. The owner had the repair already carried out at a company known to him, there are only pictures, no expert report. The pictures I get from the lawyer only after payment of the invoice. On the vehicle are 7 years warranty against leak. I just with the manufacturer tel efoniert. He takes over nothing at all and refers to the leak control carried out by the authorized partner without defects. He also points out that the 7-year warranty applies only to the first buyer (does not exist in the warranty policy). This has been changed as of 01.2014 (vehicle purchased in 05.13). Furthermore, the running workshop is not a partner operation and there is no expert report, there is no payment anyway. The damage seems to be massive and is probably safe. My lawyer is, of course, still on vacation, as always when you need him. My questions: -Is this later modification of the warranty allowed? Finally, this was a reason to buy the WoMo. -Can the owner simply have it repaired with any operation without question? It was not an authorized partner workshop of the manufacturer, moreover, NO expert opinion was prepared. (I think no) -Who is liable here? If the damage was really so massive was doc h sure with the tightness control botched or deliberately concealed? If it was really a mounting error of the manufacturer, would this have to be liable? Opposition to warning lies here already. Notice for coercion and fraud I will probably also make.