RENNtech ECU Upgrade E 550 (C207- 402 HP / 405 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 directly to the ECU. Programming takes only a few minutes and the vehicle can be reflashed at any time as many times as you wish.

Our proprietary ECU upgrade for the Mercedes M273 engine offers gains in performance across the entire RPM range without sacrificing around town comfort or daily driver reliability.

With the newest update of their Software Upgrade for the M273 – 5.5L V8 RENNtech boosts the 550-Series by up to 20 HP and 14 TQ. The RENNtech upgraded M273now produces up to 402 HP and 405 LB-FT at crank.

E 550 (C207) Stock Performance:

• 382 HP @ 6000 RPM; 391 LB-FT @ 2800-4800 RPM

Gains:

• 402 HP @ 6000 RPM; 405 LB-FT @ 2800 RPM