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

Auto button lighting problem

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Old Feb 21, 2021 | 04:14 AM
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AbdulazizAhmad's Avatar
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W140
Auto button lighting problem

Hello The problem is as shown in the picture The automatic button is on, and it has not been pressed
Mercedes W140 S model 500 1997



Last edited by AbdulazizAhmad; Feb 21, 2021 at 05:12 AM.
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Old Feb 21, 2021 | 05:21 AM
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From: Madison, Alabama
13 E550 Coupe & 99 C280
I had the same thing happen on my 2000 CLK 430. I had almost the same climate control unit as this. My mechanic used the Mercedes removal tool and disconnected the unit from the harness. Plugged it back in and it functioned properly. I went thru 2 or 3 of those units in the time I owned the CLK. There are shops on Ebay that will repair them or when you remove the unit write down the part# and search. Good luck !
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Old Feb 21, 2021 | 06:32 AM
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W140
Originally Posted by TEAsE550
I had the same thing happen on my 2000 CLK 430. I had almost the same climate control unit as this. My mechanic used the Mercedes removal tool and disconnected the unit from the harness. Plugged it back in and it functioned properly. I went thru 2 or 3 of those units in the time I owned the CLK. There are shops on Ebay that will repair them or when you remove the unit write down the part# and search. Good luck !
Hello dear, I disconnected 2 cable and put it back as it is but nothing has changed
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