Technical how to tighten the connection on the slioding door at the top so it shuts

[mark pegasus]

hi can anyone explain how to tighten or replace the U shape lock connection on the top of the sliding door, it falls down unless it is up the top of the door does not shut tight , i need to always adjust it by hand to shut the door correctly, i saw on Renault van it just requires tightening but i cannot see where on the 3 litre model 2008 where to tighten it , please give advice best Mark -

 

[bugsymike]

Just guessing as not there with you, but is it possible the bottom sliding bracket isn't taking enough of the weight of the door and the top one should be more of a guide to keep it in line as it slides shut.
I have adjusted many in the past on Iveco Daily's and older Ducatos to around 2006.