Be careful, sell used luxury cars (S-Class) for ov...

Be careful, sell used luxury cars (S-Class) for over 45,000 euros and guarantee properties such as TV tuners in the purchase contract.
Then deliver a vehicle with a tuner that has not worked in Germany since 2017 and are not ready to take over a retrofit. As a customer, you are not king here, but the stupid one who has to pay in the end to get the vehicle as it was actually guaranteed in the purchase contract.