AC light
Thread Starter
Newbie
Joined: Nov 2012
Posts: 8
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2010 C250 Sport Premium
AC light
Was just wondering every time I fiddle around with my temp settings more specificaly the heat in winter the AC light turns on. For instance if I have everything set manually then I change to auto the AC light will turn on. Is this a bug or intentional. Its -20 here in canada so AC is def not needed!
Junior Member
Joined: Nov 2011
Posts: 49
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2012 C250
Just leave it on auto. For the longest time I didn't trust automatic climate control systems, but with this W204 the auto's control of the ventilation is spot-on. And my understanding is the A/C compressor is only turned on when needed - it won't keep the compressor engaged full-time; think of it as an indication that A/C can be activated, and when you explicitly turn the light off by selecting the A/C buttom, you're telling the system to never turn it on.
MBWorld Fanatic!
Joined: Jan 2009
Posts: 5,113
Likes: 57
From: Southwest USA
Another round of ICE
Was just wondering every time I fiddle around with my temp settings more specificaly the heat in winter the AC light turns on. For instance if I have everything set manually then I change to auto the AC light will turn on. Is this a bug or intentional. Its -20 here in canada so AC is def not needed!
MBWorld Fanatic!
Joined: Nov 2007
Posts: 2,078
Likes: 4
From: NYC
2012 C300 4Matic
Sportstick, of course, is spot on.
Leave the AC light on. All it really means is that you are giving the system permission to use the compressor as necessary based on the readings from the humidity sensor. The difference in mileage should be fairly negligible since it's not running the compressor very much.
Leave the AC light on. All it really means is that you are giving the system permission to use the compressor as necessary based on the readings from the humidity sensor. The difference in mileage should be fairly negligible since it's not running the compressor very much.
