With regards to a 1992 300E...
I recently noticed that my A/C blows warm in stop-n-go but is cold at steady speed above 25 mph. Upon observation, the auxiliary fans are not coming on with the compressor (as I know they should). The last time I experienced this, the fuse was bad. This time around, the fuses seem to be okay. Is it my A/C relay, or R-12 level? This is confusing because the A/C is cold at speed and my fuses are okay. Any advise would be greatly appreciated.

Thanks in advance,
ARVY
1992 300E (152,000 mi.)
1984 190D 2.2 (163,000 mi.)