Buying a used, cheap luxury car

I have a choice between a used Cadillac CTS and a used Mercedes-Benz S-Class - not sure whice is the best car of the 2. Both priced are around £4000, both luxury cars, fully loaded. I'm retired looking...

Is £16,500 a fair price for a 'brand new' Cadillac CTS?

I have been offered a 'brand new' Cadillac CTS 3.6 for £16,500. The car appears to be brand new, unmarked, with some transit packaging still in place, with 120 miles on the clock and a new battery. On...