Scottytee

I've searched the forum and found other older models with this issue, but I haven't found any info on the x166. The other day I pulled my driver's side interior door handle and something came loose and the handle moves freely but the door doesn't open. It sounds like a very common issue for MB's. There are 3rd parties selling repair kits for other models, but I have not found one for my 2018 GLS 450. By all accounts, I'd need to replace the entire interior door panel, which is going to be very expensive (CPO extended warranty will not cover). Anyone have any advice/info? Thanks