The RENNtech Sledgehammer’s widebody merges the bespoke customization process with cutting edge design, precision engineering, and 36 years of Performance Without Compromise. Developed and built entirely in house, the SEC Sledgehammer V12 merges Hartmut’s pre-merger heritage with RENNtech’s state-of-the-art engineering, continuing a lineage rooted in the golden era of bespoke Mercedes-Benz performance. At the heart of the SEC Sledgehammer lies a 7.5 liter naturally aspirated V12, based on the legendary M120 architecture. The engine is comprehensively reengineered with forged internals, CNC-ported cylinder heads, advanced intake and exhaust systems, equal length headers, and bespoke calibration. Output is rated at 650 horsepower and 650 Ib-ft of torque, delivered through a 7-speed manual transaxle. Chassis development includes RENNtech adjustable coil over suspension, reinforced control arms, carbon ceramic braking systems, while bespoke forged 19-inch wheels complete the widebody stance. The result is a vehicle engineered to modern performance standards while preserving the mechanical character and presence that defined the era. #RENNtech #Sledgehammer #V12
Hartmut’s favorite song on top of hartmut’s new favorite car. “RENNtech’s journey began where the pre-merger era left off” says Hartmut Feyhl, founder of RENNtech. “The SEC Sledgehammer V12 is not a tribute - it is a continuation. It represents what these cars were always capable of, had the limits of their time not existed”. Introducing the RENNtech SEC Sledgehammer V12, an ultra-limited commission of just twelve vehicles worldwide, representing the ultimate evolution of the C126 SEC platform. Developed and built entirely in house, the SEC Sledgehammer V12 merges Hartmut’s pre-merger heritage with RENtech’s state-of-the-art engineering, continuing a lineage rooted in the golden era of bespoke Mercedes-Benz performance. At the heart of the SEC Sledgehammer V12 lies a 7.5 liter naturally aspirated V12, based on the legendary M120 architecture. The engine is comprehensively reengineered with forged internals, CNC-ported cylinder heads, advanced intake and exhaust systems, equal length headers, and bespoke calibration. Output is rated at 650 horsepower and 650Ib-ft of torque, delivered through a 7-speed manual transaxle. Chassis development includes RENtech adjustable coil over suspension, reinforced control arms, carbon ceramic braking systems, while bespoke forged 19-inch wheels complete the widebody stance. The result is a vehicle engineered to modern performance standards while preserving the mechanical character and presence that defined the era. #RENNtech #SLEDGEHAMMER #RENNteched
“RENNtech’s journey began where the pre-merger era left off” says Hartmut Feyhl, founder of RENNtech. “The SEC Sledgehammer V12 is not a tribute - it is a continuation. It represents what these cars were always capable of, had the limits of their time not existed”. Introducing the RENNtech SEC Sledgehammer V12, an ultra-limited commission of just twelve vehicles worldwide, representing the ultimate evolution of the C126 SEC platform. Developed and built entirely in house, the SEC Sledgehammer V12 merges Hartmut’s pre-merger heritage with RENNtech’s state-of-the-art engineering, continuing a lineage rooted in the golden era of bespoke Mercedes-Benz performance. At the heart of the SEC Sledgehammer V12 lies a 7.5 liter naturally aspirated V12, based on the legendary M120 architecture. The engine is comprehensively reengineered with forged internals, CNC-ported cylinder heads, advanced intake and exhaust systems, equal length headers, and bespoke calibration. Output is rated at 650 horsepower and 650 lb-ft of torque, delivered through a 7-speed manual transaxle. Chassis development includes RENNtech adjustable coil over suspension, reinforced control arms, carbon ceramic braking systems, while bespoke forged 19-inch wheels complete the widebody stance. The result is a vehicle engineered to modern performance standards while preserving the mechanical character and presence that defined the era. #RENNtech #SLEDGEHAMMER #RENNteched
Upgrade your W212 Mercedes-Benz E-Class with our premium pre-preg carbon fiber trunk spoiler engineered for style, fitment, and performance-inspired aerodynamics.
Designed specifically for the 2010–2016 Mercedes-Benz E-Class sedan, this high-gloss carbon fiber spoiler enhances the refined factory body lines while adding an aggressive AMG-inspired look. The UV-protected clear coat delivers a deep gloss finish with a carbon weave appearance that complements OEM AMG carbon fiber styling.
Built for a clean, hassle-free install, this W212 E-Class spoiler requires no drilling, no trunk modifications, and mounts securely using 3M double-sided automotive tape.
Perfect fit for:
Mercedes-Benz E-Class Sedan W212
Model years 2010, 2011, 2012, 2013, 2014, 2015, 2016
#RENNtech #RENNteched #w212 #carbonfiberparts
Unlock serious performance from your Mercedes S/W212 E63 M157 Biturbo 4MATIC with the RENNtech Intermediate ECU Upgrade 🏁
Engineered for daily drivability, reliability, and power, this TÜV-approved ECU tune delivers up to 638HP and 695LB-FT of torque, with gains of up to +33HP and +49LB-FT across the RPM range.
Designed for Mercedes-AMG models equipped with the M157 Biturbo 4MATIC engine, this intermediate ECU upgrade is perfect for drivers who want a stronger, faster, more responsive daily driver without adding unnecessary stress to driveline components.
Ideal for regions with extreme heat, high altitude, or fuel quality concerns, this RENNtech M157 tune offers a slightly reduced calibration compared to the standard tune while still delivering aggressive, white-knuckle AMG performance at an excellent value.
Performance, reliability, and everyday comfort — all in one Mercedes-AMG ECU upgrade.
#RENNtech #RENNtech #w212 #s212 #wagonwednesday
For over 36 years, RENNtech has stayed true to one promise: performance without compromise.
From iconic magazine covers to legendary builds, these moments capture the evolution of RENNtech engineering and the passion that has defined our brand for decades. Each feature is more than a headline—it’s a milestone in a legacy built on innovation, precision, and uncompromising Mercedes-Benz performance.
What began over three decades ago continues today with the same commitment to delivering world-class power, refinement, and reliability for enthusiasts around the globe.
36+ years strong. Countless features. One philosophy: Performance Without Compromise.
#RENNtech #RENNtechclassic
Bring modern stopping power to your classic Mercedes-Benz 🏁
This complete Big Brake Upgrade is engineered for the Mercedes-Benz SL R129 and E-Class W124, designed for vehicles running 18” wheels. Featuring 355mm front rotors, 325mm rear rotors, 6-piston front calipers, and 4-piston rear calipers, this kit delivers powerful, consistent braking performance when it matters most.
The complete package includes rotors, calipers, pistons, brackets, hats, and braided stainless-steel brake lines for improved durability, confidence, and control under heavy braking—on the street or at the track.
#RENNtech #RENNteched #RENNtechclassic #r129
Unlock the full potential of your M113-powered Mercedes-Benz R129 SL500 with the RENNtech R1 Performance Package.
Engineered for enthusiasts who want more power, sharper throttle response, and enhanced driving dynamics, this performance upgrade combines a proprietary RENNtech ECU Upgrade with a full Carbon Fiber Airbox to improve airflow, engine breathing, and cylinder filling.
The result? Gains of up to 23 HP and 26 LB-FT of torque, with stronger response across the entire powerband while maintaining the refined drivability your SL deserves.
Classic Mercedes style. Modern RENNtech performance 🏁🔥
#RENNtech #RENNteched #RENNtechclassic #r129
Turn your Mercedes-AMG GT into an even more thrilling machine with the RENNtech R1 Performance Package 🔥
Designed as the ultimate entry-level performance upgrade for the Mercedes-Benz C190 AMG GT, this package unlocks serious gains from the 4.0L V8 BiTurbo M178 AMG engine with up to +105 HP and +125 LB-FT from RENNtech’s proprietary ECU tune.
The performance doesn’t stop there. The R1 package also includes RENNtech stainless steel downpipes with 200-cell sport catalytic converters, engineered and manufactured at RENNtech Headquarters in Stuart, Florida. Finished with a ceramic coating to help reduce engine bay heat and fight thermal stress, these high-performance downpipes add an extra +10 HP and +15 LB-FT on the AMG GT-S.
To complete the package, the RENNtech R1 Performance Package includes Blow-Off Valve Adapters and dual high-flow air filters for the M178 engine, creating a sharper, more responsive, and more exciting driving experience. The result? Up to 611 horsepower and 592 lb-ft of torque with the perfect balance of power, reliability, and daily drivability.
#RENNtech #RENNteched #amggt #c190
“With an estimated 408 horsepower, a five-speed automatic transmission, massive brakes, and a slippery 0.29 Cd, the RENNTech E60 produced performance comparable to a Viper’s.” - Motor Trend, 1997
#RENNtech #RENNtechclassic #RENNteched #throwbackthursday
Unleash the full potential of your Mercedes with our RENNtech Power Module (RPM)⚡️
Engineered to deliver more horsepower, more torque, and sharper performance across the entire power band. By refining ignition timing, throttle mapping, and air-to-fuel ratios, this upgrade gives you the power, response, and reliability serious drivers demand.
Built for performance and precision, the RPM is housed in a CNC-machined 6061 aluminum case and features pre-labeled wires and connectors for a clean, seamless install. Want to return to factory settings? The included bypass plug makes it easy to switch back to stock in minutes, and the harness can be fully removed whenever needed.
Backed by 30+ years of ECU tuning expertise, extensive in-house R&D, and real-world long-term testing, the RENNtech RPM delivers the perfect balance of power, quality, reliability, and engineering excellence.
#RENNtech #RENNteched #enginetuning #mercedestuning
Take your Mercedes-AMG GT to the next level with the RENNtech Lowering Kit - engineered to deliver a more aggressive look, improved handling, and precision adjustability at every corner.
Designed for enthusiasts who want more than just a drop, this proprietary suspension system lets you lower your vehicle up to 1.5 inches front and rear using adjustable spring perches on the OEM dampers. The result is a more commanding stance, enhanced balance, and performance you can feel in every turn.
Crafted from high-strength, lightweight aluminum, the kit offers independent four-corner ride height adjustment and even supports corner weighting for a more tailored setup. Best of all, you get the flexibility of a full suspension upgrade without the cost of a complete coilover conversion.
#RENNtech #RENNteched #amggt #c190
