RENNtech ECU Hand Held Tuner (HHT) for CLK 63 AMG BS (C209- 534 HP / 485 LB-FT) mclaren-765-lt-esr7899147 By pressing Button 1 on

By pressing Button 1 on the remote control

Confirm If Your Car Is Equipped with Factory Exhaust Valves* - EVM will not work on vehicles without factory exhaust valves

Rated by Mercedes-Benz:      577 HP @ 5

E450 (Airmatic Optional)

RENNtech ECU Hand Held Tuner (HHT) for CLK 63 AMG BS (C209- 534 HP / 485 LB-FT) mclaren-765-lt-esr7899147 By pressing Button 1 onRENNtech 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