maybe it's NOT a std. feature on the GL--guessing there. check the manual to be sure. the wife's CLK's says something in the book about mirror adjust switch must be on the pass. side & then there is the usual MB spiritual ritual that you must conduct to 'set it'. I'll try to find & see if it comparable to your issue.
You can activate / deactivate the mirror rear view assist through the cluster. That is how I've always set it up. Especially in the 211 chassis (E-Class). If you can't seem to figure it out, I'd stop by the dealership and they should do it for free. Or if your in the So-Cal area come by German Independent and I'll be more than happy to help you out with it.
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Fred Cinelli
German Independent
11006 Santa Monica Blvd.
Los Angeles, CA, 90025
(310).473.9360
I have checked the user manual and there isn't any think about mirror adjust.
On my CLK there is by turning on the right side mirror adjust button "on".
I called the dealer and they told me the same thing about turning on the right side mirror adjust to "on" position but it isn't working for my GL.
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