I have a 1991 300D 2.5 and while I was driving with the A/C on, the fan just quit all together. The A/C compressor is engaging, the fuse is not blown, but the fan does not work. I found the following post and was wondering where this part is located and if anyone else has any other suggestions. The fan will not work in the heat position as well.

Climate control fan stopped working (1990 420 SEL)