That part number is for a complete harness!
Even with a new door panel you must cut out for the seat switch! So unless you get a used one that is already modified you must cut out the switch hole.
Would think that a good tech could do that in 6 to 8 hours!!
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)