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Since 1989 RENNtech has led the way of Performance Development for Mercedes-Benz and AMG vehicles. With over 30 years of experience we continue to develop extraordinary Mercedes-Benz vehicles that bult to out-perform all others.



Optimal Performance through increased displacement, and drivetrain swaps. Upgraded internals, pistons, camshafts, exhaust, intake manifolds, and engine management. Automatic transmission upgrades and manual transmission swaps.

M100 6.9 liter

M103 3.6 liter
M117 6.0 liter
M119 6.0 liter
M120 7.4 liter
 &  7.6 liter


Chassis upgrades for optimal handling. Suspension, exhaust, brakes, wheels, and more.

Custom Exhaust Systems
Aerodynamic Body Kits

Suspension Upgrades

Performance Brake Systems

Forged Wheels


The Measurable Results

50 YEARS of M.B. Power

Hartmut Feyhl's career began at AMG where he was an integral part in the development of the legendary 300E AMG 6.0 "Hammer". Later as the Technical Director for AMG North America, Feyhl was responsible for overseeing the engine builds for all the North American spec AMG Hammers up until 1989. Today, Feyhl's leadership is being passsed on to the next generation of RENNtech technicians, performing re-power and restorations of these legendary vehicles.

RENNtech 6.0-liter

6.0L Engine Conversion

327 HP & 372 LB-FT 

Price by Request

RENNtech 6.0 -liter
6.0L  Engine Conversion

385 BHP & 402 LB-FT

Price by Request


RENNtech 7.4 and 7.6 -liter

7.4L | 585HP & 501 LB-FT
7.6 L | 615 HP & 703 LB-FT

Price by Request

M117 / 119 / 120 / M113

Custom Development

Bore & Stroke, Turbo Charged or Super-Charged.

Price by Request

RENNtech S76R 600 SEL

S76R 7.6 -liter V12
The Ruler of W140 S Class

M120 | 7.6 liter |  615 HP | 703 LB-FT

Re-imagined for 2022, the RENNtech S76R was built to the highest spec around the RENNtech built M120 V12 engines and further developed utilizing modern technology.


RENNtech E60 Wagon
Widebody Wagon

M113 | 6.0  | 402 HP 

Custom power development for 1993 Mercedes-Benz 500 SL with RENNtech 6.0 liter twin turbo charged power conversion.


RENNtech 500 SL Twin Turbo
Forced Induction for a Classic

M119 | 6.0 | Twin Turbo

Custom power development for 1993 Mercedes-Benz 500 SL with RENNtech 6.0 liter twin turbo charged power conversion.


Mercedes-GE 230 M113
V8 Power Swap for G-Wagen Truck

M113 | 5.5 | 354 HP

Custom build 1989 Steyr-Puch GE230 with upgraded power, handling and drivetrain. Built for everyday driving with modern power and convenience.

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