The standard Sunroof on my 2000 ML320 seems to have mind of it's own. Sometimes when it is partly open and I press the switch to open it more fully it closes instead !

Today when I went over a speed bump the sunroof opened itself to the full tilt position without me touching the switch.

It also appears top be a bit sticky i.e. takes many presses to get the sunroof moving

Is this a faulty switch or a timing issue ?

If I need a new switch are they easy to install myself ?

thanks

Doug