Tuner Mercedes 350 CLS: The ART GTR 374

The tuning floor at the Frankfurt auto show will be packed to the rafters with tweakage this year. There, among the Brabus and AC Schnitzers, will be upstarts like Nuremberg's ART, a firm not known for restraint. But with its latest tuning job, performed on the Mercedes 350 CLS — the GTR 374 — the company's putting on… » 8/24/07 8:25am 8/24/07 8:25am