mobile GUARANTEE Germany; VW Golf 7

Hello, I have found a nice Golf 7, 1.6 TDI, for 11,000€. I will be able to see the car again on the lift tonight, after which I have to decide whether to buy it. The car has run 91,000 kilometers and is 4 years old. The used car dealer does not have his own workshop, therefore he offered me the “mobile GARANTIE Deutschland” as a guarantee (LINK: http://mobile-garantie.de/). I looked on the net for a few experiences and reports. t. Unfortunately, there aren’t many. I found 2 forum entries, but they were from 2011. However, these 2 were also negative. But as it often is: people who don’t work, write a lot. Everyone else is just happy that everything worked out well and don’t make a thread. For this reason, I’m going to open a thread here: Has any of you ever had experiences with this, which they can write to me, what damage regulation and the course of a damage case caused. The Golf 7 is well-kept and always went to the workshop. In the 2 forums mentioned above was the excuse of the mobile GARANTIE Germany, which the cars did not get a suitable service at the observed time or e.g. with a crack of the control chain: “This is a known problem of VW, for that we do not pay”. I am now a bit afraid, although I was previously good things. LG MH12