Date registered: Mar 2014
Vehicle: 1994 E320, 1997 E420, 1999 E320 4MATIC, 1999 SL500
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Quoted: 162 Post(s)
HVAC system has a mind of its own
On my '97 E420 the AC runs, and it even blows cold! Mostly.
It seems to get confused though. And it seems that no matter which buttons I push, and regardless of whether it is in automatic or manual mode, the air coming out of the vents has little to no relation to the setting on the control panel. The exception is that the fan speed controller works as expected.
The most amusing part is how the right and center right dash vents are blowing cold air while the left and center left vents are blowing hot air.
a) There is some aspect of this sophisticated, elegantly designed, German engineered HVAC system that I am missing.
b) Something paranormal is occurring.
c) Something broke.
The forum's insights would be appreciated. Cheers.