If you had the choice of one of these cars, free of charge, which one would you choose?

BMW did play "Dream on" in their commercials so...

Whichever has the highest resale value so I could buy a cheaper car and have some spending money.

Needs an "other" option.

I had to choose between Corvette and viper because I definitely prefer American muscle. I ended choosing corvette simply because it's a classic.

I'm not much for cars over trucks and 4 wheels drives.

I'd take a Ford F-100 or a Willys MB over a sports car anyday!

That assumes that the car you want for the purposes of owning rather than selling is the most expensive. I don't necessarily want a fancypants car. I'd probably rather have an unassuming car even without the wad of cash. (Depends on the car. I'd take a 65 Mustang. Though I don't know if that's "assuming") Expensive cars have expensive parts and repair pieces.

My grandpa gave us a 2000 Cadillac Thanksgiving '08. It was the best and most fancy car we've ever owned, but it died within 4 months and the repair cost was more than the car was worth because of the parts.

The best brand is Mercedes. What other company could have withstood the following and still had so many supporters, and command a significant price premium versus most other brands

(i.) a decade of look-alike vehicles - when GM did this is the 1980s critics panned the designs, but when MB does the same we call it "classic", "restrained" etc.
(ii.) six-eight years of reliability issues, even in core products - suspension collapses on the S Class, electronic gremlins in the E and SL classes
(iii.) low customer satisfaction scores for many MB dealerships - especially those not on the West Coast
(iv.) rapid product proliferation into new segments of the market

Here the aim is not to knock MB but rather to highlight how strong the underlying brand has had to be in order to ride out many challenges that would have knocked down lesser brands.