With years of receiving BMW customer service and only months from Mercedes, the latter are definitely winning me over.
BMW used to provide courtesy BMWs through Enterprise, that changed to being charged £20 and then simply not available. MB gave me a ML to replace my c63 estate, for free.
MB have a goodwill scheme for items out of warranty, BMW never did.
And in terms of sales, MB already won me over last year.
Now it's down to the cars, still undecided.