**Question:** I picked up my Citroën C4 II, built in 2010, with a 1.6 VTi 120 engine from the workshop, where the control chain was renewed. After a maximum of 50 kilometres of drive, there was a jerk when parking on the side stripes, the car went out and couldn’t be started. The ADAC then found out that the newly built control chain was torn. What rights do I have in this case? Can I make the workshop liable? Are there a new repair, S I am grateful for any help.