A friend has an A8 4.2 BJ95 me and the ignition lock is defect he has to shake around in the lock until he starts and who he is on the key must be turned back himself a piece.He wants to have a new ignition lock built in,is that connected with a lot of work? He has the steering wheel with all the adjustments and motors.Can one help me and write me what to do to change the ignition lock or an RLF for me and thanks to you already