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RENNtech Classics

Building extraordinary performance vehicles since 1989. 

Driven by performance.

RENNtech is a automotive performance shop specializing in Mercedes-Benz and AMG vehicles. Since 1989, we have been dedicated to developing the fastest and most powerful Mercedes-Benz AMG vehicles on the planet. We have a passion for engineering excellence and craftsmanship, delivering superior quality and unmatched performance. 

Hartmut Feyhl, Owner, RENNtech Inc.


35 Years of Power

2002 : Mercedes-Benz CLK AMG 55 6.0

Built to outperform. Engines.

At RENNtech Classics, we specialize in custom engine builds and performance modifications for classic Mercedes-Benz and pre-merger AMG vehicles. Our expert team of technicians specialize in Mercedes-Benz AMG M117, M120, M119, and M110 engines, and are passionate about delivering engines that are crafted for maximum performance without sacrificing reliability.

We’re proud to provide our clients with the highest quality of service and ensure that their vehicles are always running at optimum levels.


35 Years of Performance

Speed and agility. Chassis

At RENNtech Classics, we don’t just service your classic Mercedes-Benz AMG vehicle – we upgrade it. Our team of engineers specialize in improving handling and ride quality through performance upgrades such as suspension, brakes, and transmission.

Our goal is to make sure your classic Mercedes-Benz AMG performs as intended, and to provide you with the best possible driving experience. Whether you’re looking for a performance upgrade or a full-on restoration, we are here to exceed expectations.


The Next 35 Years

Classics for the modern era.

Our restoration service at the automotive performance shop has the expertise and experience to bring classic Mercedes-Benz AMG vehicles back to life. We have the ability to restore and rebuild these vehicles from the ground up, from mechanical and electrical systems to upholstery, paint and bodywork. All of our technicians are highly trained and knowledgeable in restoring classic Mercedes-Benz AMG vehicles.


Technical and mechanical service for all Mercedes-Benz and AMG models with competitive rates, and better-than-dealer service.

Exterior & Interior Detail

Full detailing services, paint correction, carbon ceramic coatings, or re-paint using M.B. specified paints.



Functional upgrades for enjoying special vehicles. Hydraulic suspension lifts, battery kill switches, and more.


Highest Quality 

Our service department has the privilege of working on world class vehicles, trusted to our care by owners who demand the best. We are proud of our work and earn the trust of our customers one car at a time.


Contact Us

 RENNtech Classics is located in the RENNtech Head Quarters in Stuart, Fl.


7825 SW Ellipse Way, Stuart, FL 34997


Hours of Operation:

Monday - Friday, 9 am - 6 pm, and on Saturdays and Sundays by appointment. 

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