ECU Upgrade

If you want more from the 2007-2021 Sprinter VAN without touching the hardware, this RennTech ECU Upgrade is the cleanest way to get it. RennTech revises the factory calibration for the 3.0L OM642 V6, raising power and torque through the full band and keeping...

The 2008-2011 C 350 responds well to software, and RennTech has been writing engine calibrations since electronic engine management arrived in the mid-1980s. This ECU Upgrade rewrites ignition timing, throttle mapping, fueling and boost control, so the extra power arrives across the whole rev...

If you want more from the 2021-2022 GLE 63 S AMG BiTurbo EQ Boost without touching the hardware, this RennTech ECU+ Upgrade is the cleanest way to get it. RennTech revises the factory calibration for the 4.0L M177 twin-turbo V8, raising power and torque...

If you want more from the 2019-2023 G 550 BiTurbo without touching the hardware, this RennTech ECU+ Upgrade is the cleanest way to get it. RennTech revises the factory calibration for the 4.0L M176 twin-turbo V8, raising power and torque through the full band...

RennTech built its name in Florida tuning high-performance engines, and this ECU Upgrade for the 2010-present GLK 350 is the result of in-house dyno development on this engine. Timing, throttle, air-fuel and boost tables are revised as one calibration, so the car pulls harder...

RennTech built its name in Florida tuning high-performance engines, and this ECU+ Upgrade for the 2018-2020 S 560 BiTurbo is the result of in-house dyno development on the 4.0L M176 twin-turbo V8. Timing, throttle, air-fuel and boost tables are revised as one calibration, so...

If you want more from the 2018-2021 AMG GT R without touching the hardware, this RennTech ECU+ Upgrade is the cleanest way to get it. RennTech revises the factory calibration for the 4.0L M178 twin-turbo V8, raising power and torque through the full band...

The 2011-2014 CLS 550 responds well to software, and RennTech has been writing engine calibrations since electronic engine management arrived in the mid-1980s. This ECU+ Upgrade rewrites ignition timing, throttle mapping, fueling and boost control on the 4.7L M278 twin-turbo V8, so the extra...

The 2015-2021 C 63 AMG responds well to software, and RennTech has been writing engine calibrations since electronic engine management arrived in the mid-1980s. This ECU+ Upgrade rewrites ignition timing, throttle mapping, fueling and boost control on the 4.0L M177 twin-turbo V8, so the...

The 2015-2021 C 63 S AMG responds well to software, and RennTech has been writing engine calibrations since electronic engine management arrived in the mid-1980s. This ECU+ Upgrade rewrites ignition timing, throttle mapping, fueling and boost control on the 4.0L M177 twin-turbo V8, so...

The 2018-2023 Aston Martin V8 Vantage responds well to software, and RennTech has been writing engine calibrations since electronic engine management arrived in the mid-1980s. This ECU+ Upgrade rewrites ignition timing, throttle mapping, fueling and boost control on the 4.0L M177 twin-turbo V8, so...

The 2014-2021 Sprinter VAN responds well to software, and RennTech has been writing engine calibrations since electronic engine management arrived in the mid-1980s. This ECU Upgrade rewrites ignition timing, throttle mapping, fueling and boost control on the 2.1L OM651 I4, so the extra power...

If you want more from the 2019-2023 G 63 AMG BiTurbo without touching the hardware, this RennTech ECU+ Upgrade is the cleanest way to get it. RennTech revises the factory calibration for the 4.0L M177 twin-turbo V8, raising power and torque through the full...

The 2021-2023 GLS 580 BiTurbo responds well to software, and RennTech has been writing engine calibrations since electronic engine management arrived in the mid-1980s. This ECU+ Upgrade rewrites ignition timing, throttle mapping, fueling and boost control on the 4.0L M176 twin-turbo V8, so the...

The 2017-2023 E 450 BiTurbo responds well to software, and RennTech has been writing engine calibrations since electronic engine management arrived in the mid-1980s. This ECU+ Upgrade rewrites ignition timing, throttle mapping, fueling and boost control on the 3.0L M276 twin-turbo V6, so the...

If you want more from the 1997-2003 CLK 430 without touching the hardware, this RennTech ECU Upgrade is the cleanest way to get it. RennTech revises the factory calibration for this engine, raising power and torque through the full band and keeping the smooth...

If you want more from the 2006-2011 CLS 550 without touching the hardware, this RennTech ECU Upgrade is the cleanest way to get it. RennTech revises the factory calibration for the M273 twin-turbo, raising power and torque through the full band and keeping the...

If you want more from the 2016-present GLC 63 AMG, S without touching the hardware, this RennTech ECU+ Upgrade is the cleanest way to get it. RennTech revises the factory calibration for the 4.0L M177 twin-turbo V8, raising power and torque through the full...

RennTech built its name in Florida tuning high-performance engines, and this ECU Upgrade for the 2016-present GLC 63 AMG, S is the result of in-house dyno development on the 4.0L M177 twin-turbo V8. Timing, throttle, air-fuel and boost tables are revised as one calibration,...

The X290 AMG GT 63 S 4-Door is already a heavy hitter, but RennTech found real headroom in the M177 twin-turbo V8. On its own dyno RennTech measured the car at a peak 681 hp and 736 lb-ft stock, and the ECU+ calibration raises...

If you want more from the 2010-2016 E 63 AMG S BiTurbo without touching the hardware, this RennTech ECU+ Upgrade is the cleanest way to get it. RennTech revises the factory calibration for the 5.5L M157 twin-turbo V8, raising power and torque through the...

RennTech built its name in Florida tuning high-performance engines, and this ECU Upgrade for the 2004-2010 SLK 350 is the result of in-house dyno development on this engine. Timing, throttle, air-fuel and boost tables are revised as one calibration, so the car pulls harder...

RennTech built its name in Florida tuning high-performance engines, and this ECU Upgrade for the 2007-2011 SL 600 is the result of in-house dyno development on the 5.5L M275 twin-turbo V12. Timing, throttle, air-fuel and boost tables are revised as one calibration, so the...

If you want more from the 2012-2016 SL 550 without touching the hardware, this RennTech ECU Upgrade is the cleanest way to get it. RennTech revises the factory calibration for the 4.7L M278 twin-turbo V8, raising power and torque through the full band and...

The 2013-2019 GL 550 responds well to software, and RennTech has been writing engine calibrations since electronic engine management arrived in the mid-1980s. This ECU+ Upgrade rewrites ignition timing, throttle mapping, fueling and boost control on the 4.7L M278 twin-turbo V8, so the extra...

RennTech built its name in Florida tuning high-performance engines, and this ECU+ Upgrade for the 2015-2020 AMG GT S is the result of in-house dyno development on the 4.0L M178 twin-turbo V8. Timing, throttle, air-fuel and boost tables are revised as one calibration, so...

RennTech built its name in Florida tuning high-performance engines, and this ECU+ Upgrade for the 2011-2014 CLS 63 AMG is the result of in-house dyno development on the 5.5L M157 twin-turbo V8. Timing, throttle, air-fuel and boost tables are revised as one calibration, so...

The 2011-2014 CLS 550 responds well to software, and RennTech has been writing engine calibrations since electronic engine management arrived in the mid-1980s. This ECU Upgrade rewrites ignition timing, throttle mapping, fueling and boost control on the 4.7L M278 twin-turbo V8, so the extra...

If you want more from the 2015-2021 C 43 AMG without touching the hardware, this RennTech ECU+ Upgrade is the cleanest way to get it. RennTech revises the factory calibration for the 3.0L M276 twin-turbo V6, raising power and torque through the full band...

If you want more from the 2015-2021 C 43 AMG without touching the hardware, this RennTech ECU+ Upgrade is the cleanest way to get it. RennTech revises the factory calibration for the 3.0L M276 twin-turbo V6, raising power and torque through the full band...