1991 300 SE. I have searched the forums here and am quite pleased with the wealth of information. However I am at a loss because all of the things said to check here are fine. I checked the strip fuse it was intact but melted on one side. I touched it and it fell apart basically. I also checked the green/pink wire from ignition no power in on position. If I supply power to the strip fuse area viola fan works. I would consider that something may be wrong with the ingition but everything else still works. And when whatever happened it was like a fuse blew or something in the car and then no fan. Thanks in advance benz gurus.......Nate

If I'm reading the diagram correctly, the pink/green wire is dedicated to the blower. If it fails, it does not affect anything else. I'd start looking at the bulkhead harness connector and the ignition switch.

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1989 300 SEL that mostly works, but needs TLC