If the new Mercedes SL suffers from a bit of an identity crisis, this really won’t help. Because this is the Mercedes-Maybach SL ‘Monogram Series’, touted as the sportiest ever Maybach.

Mercedes used to be all about open top motoring. The SL roadster has been a staple in the Mercedes line of cars for decades.

But not all Gullwings will get nine-figure prices; a great many, in fact, live in the seven-figure world, or even less for the roadsters. A 1957 300 SL Gullwing that will cross the auction block in ...