I have a 1996 S320. The e/c button on the climate control unit is illuminated. I cannot get it to turn off. I assume that for the A/C to run, the e/c mode needs to be turned off. Any advice on what to do? Has anyone seen this before? Thanks in advance.

I belive it indicates that it is low on gas!
See if you can read codes
http://pages.prodigy.net/jforgione/MB_S500.html

Thanks for the direction. There is little, or no, pressure in the A/C system. Can I charge this myself or are there "special" tools the MB uses? I have the tools to recharge my chevy truck. Will these work?

I have a 1998 S320 and appear to have similar problem. The control unit goes on when ignition is on, and all lights and indicators appear to be working. I can even change the temp and fan speed settings. The only problem is that the fan/blower is not working at all. I checked the fuse in the boot, and that seems to be good. Is there another fuse (for the blower) somewhere else? Can anyone offer any advise?

Thanks.