Meet Our Team

Guy Covington - Co-Owner and Founder

Guy  Steph Pix1Renn Haus is part-entrepreneur, part-factory trained technicians and 100% car enthusiasts. 

Guy Covington has had a passion for cars over the past 37 years and particularly for Porsches and Mercedes. After his first ride in a 1962 Porsche 356, in the hills around San Francisco, he was hooked for life. Shortly after that ride, he took all his savings and bought a red 1963 Porsche 356B. Since that first Porsche, he has owned many wonderful cars including a National Concourse Winning 1988 Porsche Carrera Factory Turbo Body Cabriolet, 1974 Porsche RSR GT3S PCA race car, a 2006 Porsche Cayman S that was very well prepared for the track, a 2005 Porsche GT3, 2004 Porsche GT3, 1974 MB 280C, 2004 MB E55 AMG, 2012 MB C63 AMG along with many other Porsche’s and Mercedes’.

Over those years he has been focused on developing his knowledge and driving skills in the mountains of the West Coast. Guy completed multiple Driving Schools at places like Sears Point Infineon RacewayLaguna SecaSebring and Daytona. He has done numerous Driver Education events, Time Trialing and Solo Racing events.

In 2003 he became a PCA Certified National Driving Instructor and loves teaching people how to safely handle their cars at tracks such as Sebring, Daytona and others.

Guy has a long history of forming and owning successful businesses including RENN HAUS, two IBM Business Partners, an Apple Franchise and a Custom Home building company. His dedication to the highest level of business professionalism is impressive.

His simple philosophy of Honesty and Hard Work is now reflected in RENN HAUS which culminates his dream to pursue a full time life in motor sports.

Stephanie Havens - Co-Owner

Stephanie Havens, Co-Owner, has had a love of German cars since she learned to drive in her Father’s 1970 Porsche 914-6 along the French Riviera. She mostly drove cars with manual transmissions, until she became a mother, as she enjoyed the feeling of controlling the car’s dynamics and performance.

Her goal and the goal of all at RENN HAUS, is to ensure women be treated the way she expects to be treated and the company has accordingly developed a strong following among bright women who appreciate this approach!

After receiving her Ph.D. in Clinical Psychology, she worked in the Industrial-Organizational consulting field prior to co-founding RENN HAUS.   Despite not having the strong background in car repair estimating as everyone else at RENN HAUS, she quickly picked up the knowledge required to provide estimates and helpful options to the customer.  Not surprisingly in light of her background, she is fluent in French and always enjoys conversing with RENN HAUS' french-speaking customers!


Shaun Lulofs - General Manager - 15+ yrs. experience

       . Mercedes-Benz Trained Master Technician of 8 years

Mitchell Spetsios - Service Manager - 5+ yrs. experience

  • Mercedes-Benz STAR Certified   


Steven Jones - 30+ Years Experience

Steven Jones

  • 30+ Years as BMW, Mercedes & Porsche Technician
  • Graduated from BMW Training in Berchtesgaden, Germany in 1976 (Bi-lingual in German and English)
  • 20 Years as Head of Engine & Drive Train Development and Tuning at Renntech Inc Florida specializing in MB, Porsche, BMW and MINI
  • Supercharged and Turbocharged many engines for maximum performance
  • Custom Fabrication of Stainless-Steel Exhaust Systems
  • Developed 6.5L Conversion for Porsche 928 S4
  • Developed Custom Mechanical Valve Train for MB 119 Engine

Steven Jones brings to RENN HAUS his 30+ years of extensive and impressive experience in servicing and maintenance, tuning, engine/transmission rebuilding and modification of Mercedes-Benz, SLR McLaren, Porsche, BMW, Mini and other exotic automobiles.

For the past 20 years Steven was the Director of Tuning and Engine/Transmission Development for Renntech Inc. in South Florida. Over this period he was a significant contributor in building Renntech into one of the largest and most successful tuners in the United States.

He has tuned, rebuilt, turbo-charged and super-charged everything from Mini Coopers to the one-of-a-kind SLR McLaren racecar.  He has brought to RENN HAUS his relationships with some of the top tuners in Germany such as Evotech and MKB Germany.


Avrum Raynor - 16+ Years Experience 

  • Mercedes Benz Factory Trained Master Technician 

Kyle Lulofs - 12+ Years Experience

  • Mercedes Benz Factory Trained Master Technician of 8 years

Jason Christensen - 20+ Years Experience

      .   Audi - Mercedes Benz Factory Trained - Volvo Factory Trained - Volkswagen Factory Trained



is continually looking to bring our customers the top services available in the US. With our tremendous talent and experience, along with our team's integrity and passion, RENN HAUS continues to be one of Florida's leading independent German car service, maintenance and restoration shops. 

Stop by, meet OUR TEAM and discuss any questions or ideas you may have for your fine automobile.


Career Opportunity

BMW Technician Opportunity

RENN HAUS is currently looking for an experienced BMW Service Technician with a minimum of 5 years experience. We offer top compensation that includes 100% employee paid health insurance and...

Read more
News and Events about Performance Transmission Installation
First Name (*)

Please type your full name.
Last Name (*)

Invalid Input
E-mail (*)

Invalid email address.

Invalid Input
Additional Info/Comments

Invalid Input