AC/Heater/Defrost Fan kills battery on 1998 Mercedes-Benz SL500

Not long ago I discovered that I had a dead battery. After recharging @ reprogramming my 98 SL500 everything seemed fine. Then when I killed the car I sat listening and hear a small, very quiet fan blowing up thru the Defrost. The only way I can keep it from draining my battery is if I remove the large green 15 fuse. I have to open the hood and plug it in to have AC or heat now... Can anyone tell me which part needs replaced?

by in Magnolia, MS on January 16, 2014
1 answer
ANSWER by on January 30, 2014
Most likely the bolwer relay.

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