Electric folding mirror fault?? - Mercedes-Benz Forum
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#1 (permalink) Old 02-19-2007, 04:00 AM
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Electric folding mirror fault??

i have a c220 cdi coupe with electric folding mirrors but they have stopped working correctly so looking for some advise! The indicator on the passenger side has stopped working also and displays as an error on the dash, i have taken the mirror casing off and put it on drivers side connection to check it and the led's worked fine on that side so nothing wrong with them, nor are there any splits in the wire for the indicator on the passenger side so am at a loss as to why this is happening... is there a fuse anywhere?

Also the mirrors are folding in electrically but not out, if you push them back out they stay there, then if you press either fold-in or fold-out button they will fold in, but never fold out electrically... can't be a problem with the fold-out button on the dash as pressing it does do something... just not what it should... ie folds them in and not out!

Has anyone got any ideas how i can fix this and avoid taking it to the stealer!?
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#2 (permalink) Old 05-11-2009, 10:24 AM
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I have the exact same fault on a CLK320 Coupe. Can any body help with this?
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#3 (permalink) Old 05-11-2009, 05:58 PM
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Try over in the CLK forum, the C didn't get power folding mirrors in the US so information will be thin on the ground here.
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#4 (permalink) Old 05-11-2009, 06:54 PM
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am in the US and have Power Folding mirrors you may want to check the Motor!

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#5 (permalink) Old 05-12-2009, 12:21 AM
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Neat, I thought they were either not in the US or incredibly rare.

I would wonder if it's a limit switch of some sort, so it never knows what position it's in.
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#6 (permalink) Old 05-28-2009, 11:33 AM
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Hi, Did you get your folding mirrors fixed? Do you know what the cause was for the mirrors only folding in? My guess is it was the Front SAM or the Light/Mirror switch assy but it would be useful to know.

Regards,

Tony
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#7 (permalink) Old 05-30-2009, 08:21 AM
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Hi, I fixed my folding mirror problem yesterday. It was the switch assembly but could have been the Front SAM. Took it apart and cleaned what looked like liquid damage. May have been the result of condensation though. To test it remove the switch and measure the resistance across pins 2 and 5 - should be around 900 ohms. Press the fold In switch and it should be around 160 ohms. Press the fold Out switch and it should be around 0 ohms. If the mirrors are In and the Out switch doesn't work you can also disconnect the cable from the switch and momentarily short pins 2 and 5. If the Front SAM is good the mirrors will fold out.

Regards,

Tony
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#8 (permalink) Old 06-12-2009, 04:11 AM
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Folding Mirrors

Hi Tony sounds like you have the answer to my prob just one thing please explain what a SAM is. Thanks
Steve
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#9 (permalink) Old 06-12-2009, 09:12 AM
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The SAM is a computer de-multiplexer. Basically all the control devices (switches) on the car are hooked to the front or rear SAM. Then, all the devices that need to be controlled (lights, motors) are hooked to the front or rear SAM. When you, as an example, step on the brake pedal, the front SAM notices this, generates a command that it sends over the CAN-bus to the rear SAM, and the rear SAM turns on the brake lights. When you switch on the turn signal, that signal goes to the front SAM, which sends commands to the instrument cluster and the rear SAM. The front SAM starts blinking the front turn signals and mirror signals. The rear SAM starts blinking the rear turns signals. The cluster makes the clicking sound and blinks the indicator light. This all seems very complex but it actually simplifies the wiring of the car. If you peek under the dash it's nothing compared to a mid-90s MB, where everything had to run everywhere.
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#10 (permalink) Old 06-29-2010, 04:58 PM
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Can someone please tell me how to get access to the mirror switch? is it from the side on the dash on drivers side? near fusebox?

I have had this problem for 2 years mirrors fold in but not out and I am 99% sure its the dam switch!

Anyone got a MB part number for this switch?

Many thanks
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