On behalf of the customer !

Hello everyone, a friend of mine has a little problem with his car and I would like to hear your opinion as a legal expert about it. Car: Golf IV, Built 12/02, 1.6 105 HP , 114tsd down Passed is the following: Customer sees an ad on the Internet and drives to the dealer. A test drive is made, everything looks, trades and buys to the end. Customer was with an accompanying person on site. The contracts were written (purchase contract) with the assumption (I know z the seller (dealer) sold the car in his name, because explicitly a dealer was looking for a vehicle (due to bad experiences with the so-called “commission business/customer order”. Now the dealer confirmed this orally after the demand also that he sold in his own name (guarantee was important to customer). Now a damage has occurred (it has made a boom during the journey and the flange of the from the alternator) the whole belt is torn apart, because the flange and roll is crooked). Purchase is 4 months ago, customer calls dealer and gets a cancellation and it turns out it was a sale in the customer’s order! In the contract is actually a different name from that of the dealer. However: It is a stink normal purchase contract without the smallest indication about a commission business and without exclusion of liability! Now my question is: Does the customer have the right to supplementary performance I know it was stupid not to look at the name but the customer was rather fixed to read everything else, which seemed more important to me and did the “overreading”. I would be really grateful for some advice 🙂