WE(dealer) always fabricate a new section of harness from the rt side of the fuel tank & run it into the deck lid as many times the wiring where the hinge pivots is stretched & a quick repair won't hold long.
YOU need to get into the harness beside the fuel tank.
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)