Mercedes-Benz

If you want more from the 2015 GL 450 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 and...

The RennTech V3 Digital Lowering Module (DLM) gives you full control of the 2013-2015 GL 450's air or hydraulic suspension, corner by corner, in 1 mm steps. It plugs into the factory harness using factory pins, so nothing is cut or spliced and the...

If you want more from the 2013-2015 GL 450 without touching the hardware, this RennTech ECU Upgrade is the cleanest way to get it. RennTech revises the factory calibration for the M278 twin-turbo, raising power and torque through the full band and keeping the...

Lowering the 2007-2012 GL 550 the right way means keeping the factory suspension working as designed. RennTech's DLM adjusts ride height at each corner in 1 mm increments and can return the car to factory height above a speed you set.Watch it explainedFeatures Adjust...

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...

Lowering the 2007-2012 GL 350 the right way means keeping the factory suspension working as designed. RennTech's DLM adjusts ride height at each corner in 1 mm increments and can return the car to factory height above a speed you set.Watch it explainedFeatures Adjust...

If you want more from the 2007-2012 GL 350 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...

Lowering the 2007-2012 GL 320 the right way means keeping the factory suspension working as designed. RennTech's DLM adjusts ride height at each corner in 1 mm increments and can return the car to factory height above a speed you set.Watch it explainedFeatures Adjust...

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's Stage 2 Turbo Upgrade for the 2015-2020 AMG GT S replaces the factory turbochargers with larger, lightweight billet-wheel units and pairs them with a matching RennTech calibration. It is one of the biggest power steps you can make on the 4.0L M178 twin-turbo...

RennTech's Stage 2 Turbo Upgrade for the 2016-2021 AMG GT replaces the factory turbochargers with larger, lightweight billet-wheel units and pairs them with a matching RennTech calibration. It is one of the biggest power steps you can make on the 4.0L M178 twin-turbo V8....

RennTech's Stage 1 Turbo Upgrade for the 2016-2021 AMG GT replaces the factory turbochargers with larger, lightweight billet-wheel units and pairs them with a matching RennTech calibration. It is one of the biggest power steps you can make on the 4.0L M178 twin-turbo V8....

The 2016-2021 AMG GT 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 M178 twin-turbo V8, so the extra...

This RennTech Carbon Brake Ducts adds a purposeful carbon detail to the 2018-2021 AMG GT R. Each piece is laid up in pre-preg carbon fiber for consistent weave and strength and finished to sit naturally with factory AMG carbon trim.Features Pre-preg carbon fiber for...

RennTech's Stage 2 Turbo Upgrade for the 2018-2021 AMG GT R replaces the factory turbochargers with larger, lightweight billet-wheel units and pairs them with a matching RennTech calibration. It is one of the biggest power steps you can make on the 4.0L M178 twin-turbo...

RennTech's Stage 1 Turbo Upgrade for the 2018-2021 E 63, S AMG replaces the factory turbochargers with larger, lightweight billet-wheel units and pairs them with a matching RennTech calibration. It is one of the biggest power steps you can make on the 4.0L M177...

RennTech built its name in Florida tuning high-performance engines, and this ECU+ Upgrade for the 2018-2021 E 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,...

RennTech headers for the 2002-2006 CLK 500 are hand built from mandrel-bent, seamless T-304 stainless tubing with CNC-machined flanges, then ceramic coated to keep heat out of the engine bay. They bolt straight to the factory downpipes. RennTech measures the gain at about 15...

RennTech packages its most popular upgrades for the 2002-2006 CLK 500 into one matched R1 Performance Package. Each part is calibrated to work with the others on the 5.0L M113 V8. It includes ECU Upgrade and Carbon Fiber Air Box. RennTech rates the CLK...

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...

As engine output climbs, the transmission becomes the weak link. RennTech's Transmission Upgrade for the 2002-2006 CLK 500 is a mechanical rebuild and upgrade of the clutch packs, adding friction material so more torque goes through each gear without slipping.Features Complete disassembly and inspection...

RennTech treats the gearbox as part of the power upgrade. For the 2004-2010 CLK 350, the transmission is fully disassembled and inspected, the clutch packs are upgraded for more friction capacity, and it is rebuilt with new gaskets, seals, O-rings and a new pan...

If you want more from the 2004-2010 CLK 350 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 2014-2018 CLS 400 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 and...

RennTech's Carbon Decklid Spoiler for the 2014-2018 CLS 400 is made from pre-preg carbon fiber, the aerospace-grade process with tight control of resin content, weight and thickness. It is designed in-house to match the lines of the car and to fit without modifying the...

The RennTech V3 Digital Lowering Module (DLM) gives you full control of the 2011-2018 CLS 550's air or hydraulic suspension, corner by corner, in 1 mm steps. It plugs into the factory harness using factory pins, so nothing is cut or spliced and the...

The 2011-2018 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 2011-2018 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...

Heat soak is the enemy of a supercharged or twin-turbo Mercedes. RennTech's second-generation intercooler pump for the 2011-2014 CLS 63 AMG flows 8.7 GPM at 11.6 PSI, against about 3.0 GPM from the factory pump, for cooler, denser charge air.Features Flows 8.7 GPM at...

RennTech's toe link kit keeps the 2011-2014 CLS 63 AMG tracking straight under hard acceleration, braking and cornering. Aircraft-grade materials remove the slop of the factory links and allow fine toe and bump-steer adjustment.Features Removes slop from the factory toe links Fine toe and...