RENNtech R1 Performance Package M157

The R1 performance package for the CLS 63 features our proprietary ECU tune for the new biturbo M157 Mercedes engine which offers the largest gains on the market for the new generation 63 series.

In addition to our ECU tune, the R1 package comes with our high efficiency intercooler pump kit upgrade which includes our high flow pump replacement as well as an additional cooler with all the necessary hoses, brackets and fittings to mount on the vehicle.

The R1 performance package increases performance to an astonishing 699 hp and 734 lb/ft without sacrificing daily driver comfort or reliability.

CLS 63 (C218) Stock Performance (Without Performance Package):

• 518 HP @ 5500 RPM; 516 LB-FT @ 4800 RPM

Modified Performance (Without Performance Package):

• 684 HP @ 5500 RPM; 754 LB-FT @ 3800 RPM

CLS 63 (C218) Stock Performance (With Performance Package):

• 550 HP @ 5500 RPM; 590 LB-FT @ 4800 RPM

Modified Performance (With Performance Package):

• 684 HP @ 5500 RPM; 754 LB-FT @ 3800 RPM