We took ours in for some warrantee evaluation a week ago. Several of the poppers that the roofline catch-net attach to have broken off, the left rear speaker wasn’t working, the steering wheel + volume button works but doesn’t click with poor feed back. There are several poorly attached seals around the boot and the rear curtain runner keeps dropping (MP Horizon) and of course the obligatory roof measles...
MB were really good, all parts are on order, this includes new upper bed and complete tailgate trim. The speaker turned out to be a poor connection under the dash and since they use a MB approved body shop I have a appointment to get the roof assessed there. I don’t think this is a concern but apparently this was the first they had seen and they did appear genuinely surprised at the state of the roof (Salisbury).