As stated MB designed the "klima" relay to protect the multi-rib single belt. HOWEVER starting in 1996 they stopped using that type of protection for the belt & NONE of the newer cars have that type of protection for the belt. They use a fusible link now.
I started by-passing the speed sensor system about 8-9 years ago ONLY when replacement of the A/C compressor was required.
If you have a good compressor but are having speed sensor cut-out problems, by-pass is fairly easy.
IF you send me a private message with a FAX # I will fax that info on by-passing the "klima" relay.
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)