Window buttons.
here, but if you mean pushing - down = pressing and pushing - up = pulling, the function of your GLK side window switches is inverted. Note 2011 GLK Operator's Manual page (number) 82: http://www.mbusa.com/vcm/MB/DigitalA...l/2011_glk.pdf. 
If so, it's a case for the dealer.
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Have you had a car that actually would work in the way you described?
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If you really want to apply your logic, then if window was "manual" you would push down on it to lower it and pull it up to raise it back.
I'm trying to understand why pulling the button up to make the window go up is backwards...




