Hello all, I bought a 2 year old Tiguan from the VW dealer about a 3-way-financing. I no longer need the car and would like to return it at the end of the contract term (October 2020). At the last TÜV in November 2019 porous engine bearings were noted but not criticized (so there was without a repair new TÜV, however these are in the TÜV report), these have to be repaired before the return and if so I can also easily to a f before the return, there is also an oil change and, if I am unlucky, a large inspection. Can I also have it done in a free workshop? Since a good friend owns his own workshop and I don’t need any invoice, of course this would be much cheaper (or do I need an official invoice for the repair? Thank you for the help!