RENNtech ECU Hand Held Tuner (HHT) for CLK 63 AMG BS (C209- 534 HP / 485 LB-FT) mercedes-benz-sl-class--231---2012-2016--sl63-amg-esr3199425 Buyer Beware: There have been

Buyer Beware: There have been reported failures the stock Turbo’s in the Mercedes-AMG 53 series M256 -engine

The maximum power number reached with the RENNtech ECU Plus Upgrade for the X253 - GLC 43 AMG SUV is 416 HP and 460 LB-FT

Our intermediate level ECU upgrade for the Mercedes M157 Biturbo 4-MATIC engine offers huge gains in performance across the entire RPM range without sacrificing around town comfort or daily driver reliability

E450 BiTurbo Wagon | MY2019

RENNtech Pre-Preg Carbon Fiber Rear Diffuser for the 219 - CLS Class

RENNtech ECU Hand Held Tuner (HHT) for CLK 63 AMG BS (C209- 534 HP / 485 LB-FT) mercedes-benz-sl-class--231---2012-2016--sl63-amg-esr3199425 Buyer Beware: There have beenRENNtech ECU HHT (HandHeldTuner) for the 209 CLK 63 AMG Black Series. Up to 534 HP and 485 LB FT LB FT. Gains: +34 HP & +20 LB FT. RENNtech HHT (hand held tuner) allows you the unlimited ability to switch between tuned and stock ECU programming and requires no ECU removal! Our proprietary tuning module stores both the RENNtech tuned file and your vehicles stock file. The module plugs directly into the OBD2 port and delivers the file you choose