Sliding door in the Spacetourer

Hello together, as was already written in other articles, the sliding doors also clap with us. Warranty is through, therefore I have to/will go to it myself. Now to my problem, I would like to look under the cover of the middle rail, but does not want to tear it off. But since before me some mechanic has tried what, is not quite fixed at one corner anymore why I could see a little the fastening. Therefore the question in the round, I go right in the A Take that I have to remove the rear lights so that the cover can be pushed backwards and hung out? Of course after the one screw has been loosened in front? In a Peugeot forum I have read some of the instructions for the repair or orientation of the sliding door, but could not download or view it because of lack of sufficient posts, is there something for Citroen too? If so, where can I find it?