The other day I got a phone call from a friend who already owns quite a collection of motor cars.

He wanted to know whether the new Mercedes C63 AMG Coupe Black Series that’s been offered to him (and which we shall be testing next week) is worth what it costs, which is to say £116,000 with one or two choice options fitted.

He also wanted to know if I thought it would make a smart investment or not, what with M-B UK only bringing half a handful of examples into the country during the next few months.

To which I replied: “Sorry mate but the most honest answer I can give you right now is… I don’t know.”