blower or fan

The blower/fan in my CLK430 (2001) decided to stop working. From the fuse box it appears a 30amp fuse regulates this but the fuse seems okay. Any suggestions as to what I should be doing or looking at next? Mine's a cabriolet and I'd like the blower working in the event an Indian summer arrives...

The problems I'm having is that at times the Heater comes on full heat along with the Fan/Blower on full power and no matter what dials i turn it won't go off,stays on for about 10mins then dies back down!!It's not happened for about 12months but it's started doin it again lately. I get the...