RennTech HHT ECU Upgrade 2003-2009 Mercedes-Benz E 63 AMG W211

RennTech built its name in Florida tuning high-performance engines, and this HHT ECU Upgrade for the 2003-2009 E 63 AMG is the result of in-house dyno development on the 6.3L M156 naturally aspirated. Timing, throttle, air-fuel and boost tables are revised as one calibration, so the car pulls harder everywhere while staying a comfortable daily driver. RennTech rates the E 63 AMG at up to 530 hp and 485 lb-ft with this upgrade, a gain of 23 hp and 20 lb-ft.

Watch it explained

Features

• Loaded through the RennTech HHT hand-held tuner via the OBD2 port, no ECU removal
• The HHT stores the tuned and the factory file, so you can switch back to stock any time
• Revised ignition timing, throttle mapping, air-fuel ratios and boost control
• Gains across the entire rev range, not just at peak
• Developed on RennTech's own dyno and road tested
• Keeps factory-like drivability and reliability for daily use

What is included

• RennTech calibration for your car
• Delivery as listed by RennTech for this model (HHT tuner or ECU flash)

Specs

Fitment notes

For the E 63 AMG (W211), 2003-2009 as listed by RennTech. Please include your VIN with the order so RennTech can confirm the exact application. Check the fitment table before ordering, and contact us if your car differs.

Fitment