RENNtech ECU Hand Held Tuner (HHT) for CLK 500 C209 | 320 HP / 355 LB-FT | MY2003-2006 mercedes-benz-gls-class--167---2020-present--gls-450-esr7245365 W/S212 - E-Class E550 BiTurbo

W/S212 - E-Class E550 BiTurbo

Our complete lowering kit allows full adjustment without the need to purchase an entire coilover conversion kit and comes with an adjustment tool to make on-the-fly suspension adjustments

ECU+ Upgrade | 669HP / 734TQ | Gains: +119HP / +190TQ

Rated by RENNtech:               563 HP @ 5

After plugging the HSM into the OBD2 port

RENNtech ECU Hand Held Tuner (HHT) for CLK 500 C209 | 320 HP / 355 LB-FT | MY2003-2006 mercedes-benz-gls-class--167---2020-present--gls-450-esr7245365 W/S212 - E-Class E550 BiTurboRENNtech ECU HHT (HandHeldTuner) for the 209 CLK 500. Up to 320HP and 339 LB FT LB FT. Gains: +18HP & +16LB 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 directly to the ECU.