Correct tools & caution are important as the air bag must be removed first. Also the SRS air bag contact spiral must be removed. If the key is turned on even to the first position with the air bag removed, you will have to go to repair shop & have the codes removed from the SRS system.
OTHER than that it is a simple mechanical job.
MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
Mercedes Benz Star Technician (2 times)
44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)