Squeaky rear trim

My 2003 V70 D5 which I have had since new squeeked and rattled from the back end for its first 10k miles , took the main dealer about five attempts before they fixed it by removing all the rear plastic panels around the windows and roof lining and smearing the joints with vaseline , I would think that WD40 would run off and in my own business which is electrical circuit breakers you need to get rid of WD40 once its done its intended job and then replace with the correct grease otherwise freeing oil will cause bearings to eventually seize solid if left in place , its not a lubricant and in many industrial applications it causes more damage than it resolves , the vaseline has worked well and have not had that annoying noise since . I have in the meantime fitted a seven seat conversion so had to remove all the trim again , its not that difficult , the vaseline was still on the joints four years and 120k miles later .

Thanks, Bernard333; I'll take it apart - looks to be easy from Haynes, famous last words :) - and try Vaseline.

Solved 

Update: Dismantling and reassembly of all the plastic trim in the boot was easy-peasy following Haynes. I'm glad I did because it contained part of the removal sequence that wasn't obvious and which probably would have resulted in a piece of broken trim otherwise. For once the ubiquitous "Refitting is a reversal of removal" was absolutely true. A doddle. I didn't have Vaseline to hand but did have a new tub of Comma Lith-Moly grease that coincidentally is almost exactly the same grey as the trim. Smearing a thin film on all parts of the trim that touch something else - including the clips that hold them in place - has totally solved the problem. Absolutely no squeaks. Bliss. :) I just wish that the bean counters had allowed Volvo designers margin to do a proper job in the first place. For anyone else with a P2 V70 contemplating the same job, the relevant Haynes chapter is 11.21, section 26, items 37-46. Read properly, allow a couple of hours, carefully observe where all the touch points are, and be sparing with the grease.