Fuse 5 powers:
ABS system
Anti-theft alarm
Power Windows
Stop lamps
Turn signals/hazzard lights
Warning indicators &
Tachometer

I would start by removing the fuse box & disconnecting one wire from that fuse connection at a time!

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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)
Retired Moderator