Plot: REVIEWS: BMW M3 CSL • BMW M1 • BMW M3 • BMW M5 • Porsche Boxster • BMW Z4 • Honda S2000 CHALLENGE: Volvo 240 attempts to jump four caravans There is a BMW frenzy on the Isle of Man. The new M3 CSL and some BMW classics: the M1, BMW's one-and-only mid-engined car to date, the M5 series 2 and the classic M3