The part number of that harness is the same as a US version. 124-440-20-06 fits only W124.036 cars from 1993. US list is $400.
The harness should take 2.5-3.5 hrs to install.
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)