The power rear hatch on our 2012 ML350 Bluetec does not seem to open fully. It will open and close fine with the key fob or the button on the door, but I'm constantly hitting my head (I'm only 5'10) on it when it is open. At the full extent of its power travel when it reaches the upper limit, you can manually push it up another 3-4 inches of travel.

Is there a way to adjust this so it opens fully, or am I doomed to bumping my head?

Many thanks!

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2012 Mercedes ML350 Bluetec 91K (hers)
2005 Corvette 55K (fun car)
2002 VW Jetta TDI 231K (mine)
1998 Volvo S70 T5 Turbo 196K (kids)
1994 Ford F150 4WD 249K (firewood hauler)
1983 Mercedes 300D 376K (diesel commuter)