RENNtech

The 2021-2026 Mercedes-Maybach GLS 600 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...

RennTech built its name in Florida tuning high-performance engines, and this HHT ECU Upgrade for the 1990-2018 G 500 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...

The 1990-2018 G 550 responds well to software, and RennTech has been writing engine calibrations since electronic engine management arrived in the mid-1980s. This HHT ECU Upgrade rewrites ignition timing, throttle mapping, fueling and boost control, so the extra power arrives across the whole...

The 2000-2002 CL 600 responds well to software, and RennTech has been writing engine calibrations since electronic engine management arrived in the mid-1980s. This HHT ECU Upgrade rewrites ignition timing, throttle mapping, fueling and boost control on the 5.8L M137 V12, so the extra...

If you want more from the 2002-2006 CLK 500 without touching the hardware, this RennTech HHT 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...

RennTech built its name in Florida tuning high-performance engines, and this HHT ECU Upgrade for the 2003-2006 CL / S / 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...

The 2004-2010 CLK 63 AMG Black Series responds well to software, and RennTech has been writing engine calibrations since electronic engine management arrived in the mid-1980s. This HHT ECU Upgrade rewrites ignition timing, throttle mapping, fueling and boost control, so the extra power arrives...

The 2004-2010 CLK 63 AMG responds well to software, and RennTech has been writing engine calibrations since electronic engine management arrived in the mid-1980s. This HHT ECU Upgrade rewrites ignition timing, throttle mapping, fueling and boost control on the 6.3L M156 naturally aspirated, so...

The 2005-2010 SLR McLaren responds well to software, and RennTech has been writing engine calibrations since electronic engine management arrived in the mid-1980s. This HHT ECU Upgrade rewrites ignition timing, throttle mapping, fueling and boost control on the 5.5L M155 supercharged V8, so the...

The 2006-2011 ML 550 responds well to software, and RennTech has been writing engine calibrations since electronic engine management arrived in the mid-1980s. This HHT ECU Upgrade rewrites ignition timing, throttle mapping, fueling and boost control, so the extra power arrives across the whole...

RennTech built its name in Florida tuning high-performance engines, and this HHT ECU Upgrade for the 2007-2011 SL 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,...

The 2007-2012 GL 320 CDI responds well to software, and RennTech has been writing engine calibrations since electronic engine management arrived in the mid-1980s. This HHT ECU Upgrade rewrites ignition timing, throttle mapping, fueling and boost control, so the extra power arrives across the...

RennTech built its name in Florida tuning high-performance engines, and this HHT ECU Upgrade for the 2007-2012 GL 550 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...

The 2007-2014 CL 63 AMG responds well to software, and RennTech has been writing engine calibrations since electronic engine management arrived in the mid-1980s. This HHT ECU Upgrade rewrites ignition timing, throttle mapping, fueling and boost control on the 6.3L M156 naturally aspirated, so...

If you want more from the 2008-2014 C 63 AMG without touching the hardware, this RennTech HHT ECU Upgrade is the cleanest way to get it. RennTech revises the factory calibration for the 6.3L M156 naturally aspirated, raising power and torque through the full...

The 2011-2014 SLS AMG responds well to software, and RennTech has been writing engine calibrations since electronic engine management arrived in the mid-1980s. This HHT ECU Upgrade rewrites ignition timing, throttle mapping, fueling and boost control on the 6.3L M159 naturally aspirated V8, so...

RennTech built its name in Florida tuning high-performance engines, and this HHT ECU Upgrade for the 2011-2014 SLS AMG GT is the result of in-house dyno development on the 6.3L M159 naturally aspirated V8. Timing, throttle, air-fuel and boost tables are revised as one...

The 2012-2015 ML 350 BlueTec responds well to software, and RennTech has been writing engine calibrations since electronic engine management arrived in the mid-1980s. This HHT ECU Upgrade rewrites ignition timing, throttle mapping, fueling and boost control, so the extra power arrives across the...

If you want more from the 2012-2019 SL 65 AMG without touching the hardware, this RennTech HHT ECU Upgrade is the cleanest way to get it. RennTech revises the factory calibration for the 6.0L M279 twin-turbo V12, raising power and torque through the full...

RennTech built its name in Florida tuning high-performance engines, and this HHT ECU Upgrade for the 2015-2017 S 600 / Maybach is the result of in-house dyno development on the 6.0L M277 twin-turbo V12. Timing, throttle, air-fuel and boost tables are revised as one...

The 2015-2024 S 65 AMG responds well to software, and RennTech has been writing engine calibrations since electronic engine management arrived in the mid-1980s. This HHT ECU Upgrade rewrites ignition timing, throttle mapping, fueling and boost control on the 6.0L M279 twin-turbo V12, so...

The 2016-2024 G 65 AMG responds well to software, and RennTech has been writing engine calibrations since electronic engine management arrived in the mid-1980s. This HHT ECU Upgrade rewrites ignition timing, throttle mapping, fueling and boost control on the 6.0L M279 twin-turbo V12, so...

RennTech built its name in Florida tuning high-performance engines, and this Intermediate ECU Upgrade for the 2007-2013 S 63 AMG V8 BiTurbo 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...

If you want more from the 2007-2014 CL 63 AMG BiTurbo without touching the hardware, this RennTech Intermediate 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 Intermediate ECU Upgrade for the 2010-2013 E 550 BiTurbo is the result of in-house dyno development on the M278 twin-turbo. Timing, throttle, air-fuel and boost tables are revised as one calibration, so the...

The 2010-2016 E 550 BiTurbo responds well to software, and RennTech has been writing engine calibrations since electronic engine management arrived in the mid-1980s. This Intermediate ECU Upgrade rewrites ignition timing, throttle mapping, fueling and boost control on the M278 twin-turbo, so the extra...

The 2010-2016 E 550 BiTurbo responds well to software, and RennTech has been writing engine calibrations since electronic engine management arrived in the mid-1980s. This Intermediate ECU Upgrade rewrites ignition timing, throttle mapping, fueling and boost control on the 4.7L M278 twin-turbo V8, so...

The 2010-2016 E 63 AMG S responds well to software, and RennTech has been writing engine calibrations since electronic engine management arrived in the mid-1980s. This Intermediate ECU Upgrade rewrites ignition timing, throttle mapping, fueling and boost control on the 5.5L M157 twin-turbo V8,...

The 2010-2016 E 550 responds well to software, and RennTech has been writing engine calibrations since electronic engine management arrived in the mid-1980s. This Intermediate ECU Upgrade rewrites ignition timing, throttle mapping, fueling and boost control on the M278 twin-turbo, so the extra power...

If you want more from the 2012-2015 ML 550 BiTurbo without touching the hardware, this RennTech Intermediate 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...