H 1 cylinder head gasket defective after 144,000 km

Unfortunately, I have to inform you that the cylinder head gasket is defective at our H 1, which we bought in May 2009. The repair will amount to approx. 2000 Euro (more). It is still in the workshop, because the head is still sanded. We have already driven 144,000 km (last customer service at 140,000 km) without real problems, all the more annoying to us. As you know, the guarantee is only valid for 3 years. So our guarantee had expired on the damage day 16 days. Even on Kulanz, as the works statistics tell me, it would be unlikely that something will be taken over at this stage. My wife drives the vehicle decently, sometimes country road, sometimes highway, sometimes short distance, sometimes long distance, just quite normal. She is so frustrated that she doesn’t want to have “her Heinz” anymore. Actually, I’m not willing to accept it just like that. Do you have any suggestions for me? Frustrated greetings