The tire tool should be 17MM and fit the manual retraction nut
at the left driver's side trunk accessed wheel well. Some
models were also provided with a custom hand-key designed
only for this purpose. This information would be found in any MB
Owners Manual. It is printed for emergency retractions of that
sunroof. Check the plastic trunk liner plus the glovebox for a
specialty key. If one is not found dont panic. Later models seem
not have those keys. A recycler is a good source to find one.


In any event this is a Dealer repair item. Very quickly damages of $6-700. even $800. can be gathered by an incorrect invasiveness never envisioned by the factory. Now I am all for the DIYer, but this one accessory is very finely constructed thus needful of specialty tools and experience. Besides, once the headliner is
removed rarely will it be the same again. Not impossible to replace
but hard to replicate factory conditions. Also, what makes one to think that the headliner would be necessary to access a possible
broken cable? Better rethink this one. Check with the MB dealer.