S-Class (W140) 1991-1999: 300 SD, S 350TD, 300 SE 2.8, S280, 300 SE 3.2, 300 SEL 3.2, S320, S320L, 400 SE, S420, 400 SEL, S420L, 500 SE, S500, 500 SEL, S500L, 600 SE, S600, 600 SEL, S600L, 500 SEC, 600 SEC

What is this for....

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Old Feb 17, 2010 | 08:07 PM
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benica's Avatar
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What is this for....

92/93 500 SEL....
On the A/C vent below the middle glove box are two buttons...one is red and the other blue...obviously..hot and cold....but what for? Turning on the A/C...system is cold without pressing the blue button...anyone care to explain what it's purpose is? Thank you!
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Old Feb 19, 2010 | 02:57 AM
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the way i understood it was: let's say you had the temp on 70F. if you pressed the blue button, it would blow COLD air from the middle to vents even though the side ones were still just cool.

my e320 has a blue roller knob which can be set to off which makes the center ones blow the same as the sides vs when i put it up all the way to max blue, it becomes very cold. this was removed for the E cars for 2005.
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Old Feb 19, 2010 | 03:01 AM
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Thank you! I got a response!
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Old Feb 20, 2010 | 12:49 AM
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Originally Posted by benica
Thank you! I got a response!
ur welcome. lol, things are slow on this corner of the forum. glad i could help. *sigh, my 94 S420 was awesome.
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