I just bought a new pair of illuminated door sills for my A200 coupé - wasn't easy to find, particularly at about a ¼ of MB listed price. So far so good ... Went on WIS, found and printed retrofit instructions (AZ82.20-P-0001AK), and it is frightening to say the least - half the car needs to be taken apart, it seems: seats out (okay); battery out?; fuse box out?; rubber door seals out?; A-pillar paneling out; footwell carpet out. I understand the need to get to the SAM unit in the passenger footwell, but it feels like most of the other work can be done without ripping the car into pieces? Has anyone actually done this on a W169, or better still - C169?