The current V8 M273 engines in the SL 500/550 are technically advanced and powerful. The RENM M-Max releases even more power and performance. The flexibility of the program is designed to fit individual needs and purposes, so all tuning components can be used individually, or in predetermined sets.

The tuning program for the SL 500/550 M-Max consists of an ECU re-calibration, hi-flow air filters, tubular exhaust headers in stainless steel, down pipes, high-flow sports cats and sports camshafts, delivering up to 460 HP (343 KW) and 630 Nm. Combined with the M-Max light weight forged wheels, the complete kit transforms the SL 500/550 to a totally new level.

Additional performance upgrades and options include racelight wheels, race brakes, adjustable coilover suspension and aerodynamic body kits.