This rear hatch panel squeaked a lot. M coupe interiors will squeak if they aren't reassembled perfectly (and I mean perfectly) or if a clip or two is missing or damaged. You have to be slow and deliberate and careful. To help this hatch trim, I sealed in the hatch lock trim panel with clear latex caulk (see pic). There was plastic-on-plastic squeaking there. I restored all the broken bosses I could and also used a dab of caulk inside them too, before screwing the parts back together. Lastly, I used felt (in pics some is black and some is yellow) wherever there was plastic-on-plastic and I could get away with some additional thickness. Super quiet now.
While I was at it, I added a piece of nappa leather over the factory carpeted piece. LeatherZ sells these pieces, and I have one on my S54. Nothing says quiet cockiness like a leather-lined hatch, I think!
|Failed plastic boss, typical, I found 4-5 more like this one. Either someone over-torqued the screws (unlikely) or someone had the hatch really, really full of cargo and they slammed it closed.|
|Added felt pieces|
|You can see the caulk here, not quite fully cured (white) waiting to become clear.|
|Leather panel for the rear hatch trim.|