Yeah that brown/beige combo belongs in the 1990s, it was a popular choice on the w140 S Class and W210 E Class and is more suited to them IMO. Also seen a few VT Commodore/Calais WH Statesmans with the same beige/brown combo, look ok.
I picked up an X5 a couple of moths ago, colour combo help me seal the deal. Better than black or a drab soul less grey.
Not a fan of the tapered off flat dash but it’s not too busy, there’s worse designs out there.