SL/R129: Remote won't roll down windows
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Newbie
Joined: Jun 2006
Posts: 13
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Remote won't roll down windows
The manual says the remote key should roll down the windows if I keep it pressed on unlock, or it will roll the windows up if I keep it pressed when locking. I have replaced the batteries and re-synched the key following the procedure in the manual, but it still doesn't work. It will do it if the key is in the door lock and I hold it one way or the other, but not remotely. Any ideas?
Senior Member
Joined: Aug 2006
Posts: 391
Likes: 6
From: So California
2000 SL500
The manual says the remote key should roll down the windows if I keep it pressed on unlock, or it will roll the windows up if I keep it pressed when locking. I have replaced the batteries and re-synched the key following the procedure in the manual, but it still doesn't work. It will do it if the key is in the door lock and I hold it one way or the other, but not remotely. Any ideas?
Newbie
Joined: Oct 2007
Posts: 5
Likes: 0
From: Genoa Nevada
1999 SL500
I have a 1999 SL and my comment mirrors Lynns' I took my car to the dealer and had it "checked out" for what I thought was a problem. The system works under ideal conditions. You simply have to be close to the IR receiver. It is either a design flaw or if you want to give Mercedes credit, it's a safety issue, that being not to be able to control the windows from far away. Me thinks I may be giving them too much credit
Senior Member
Joined: Aug 2006
Posts: 391
Likes: 6
From: So California
2000 SL500
FWIW, on my R107 I had bought the car with an aftermarket alarm in addition to the factory alarm. With the aftermarket I was able push the button from several feet away from the car and both windows wood raise to the full up position as well as lock the doors. This was NOT an IR system but worked great with the soft top down.
MBWorld Fanatic!
Joined: Mar 2007
Posts: 1,063
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From: Charlotte, NC
2002 S430, 2004 Cobra, 2004 Tahoe
Make sure you are aiming the key at the driver door...this is the door that has the IR sensor and the only way to roll the windows down with the key...sometimes you have to press and hold the unlock button twice.
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Thread Starter
Newbie
Joined: Jun 2006
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Thanks for all the tips but none have worked so far. I tried the "press 3 times" approach (didn't work). Next I tried with the remote about an inch from the IR receiver in the driver's door and that didn't work either. My wife's S class works from quite a few feet away. I only want it because I don't seem to have it. I have really never missed the feature. I can always put the key in the lock and hold it if I want the windows down before I enter the car.
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