The long version

Mercedes built this purely to keep pace with BMW in DTM homologation rules, which meant the road car inherited genuine touring-car engineering rather than a styling package bolted onto a regular 190E — the big wing and flared arches are functional, not cosmetic. Only 502 exist, and the market has recently woken up hard: a car that traded for used-Golf money a decade ago now clears six figures at auction, sometimes into seven. Forbidden Fruit applies honestly, since it never came to the US, and Homologation Hero is the whole reason it exists at all. The DTM heritage garage drives it more than any private owner does.