M113k kompressor8/19/2023 ![]() It was very easy to install and gave the car a very noticeable difference in acceleration while keeping the same luxury car feel. The HHT has renewed my interest in the vehicle. I have owned the same SL 55 for sixteen years, and have had little time to use it. Great throttle response, More power when you need it. Highly recommended upgrade for an already excellent car. Also, the ability to switch between factory and Renntech tune is a great feature and a simple procedure. The throttle response is also much better and much smoother than the factory tune. In addition to gains that you can feel across the power band, the car holds to redline and the delivery of power feels much smoother than with the factory tune. I am very pleased with the power gains on my 2004 CL55 AMG with just the tune and high flow air filters. 5 Significant gains and smooth power delivery.Please select applicable Octane/Fuel rating used in your vehicle/region at checkout.17-Digit VIN Number of vehicle is mandatory in order to program RENNtech HHT.RENNtech has been at the forefront of ECU tuning since electronic engine management started to show up in vehicles during the mid 1980's! Our experience, countless hours of in house research, development and exhaustive testing ensure that our proprietary ECU upgrade offers incredible performance gains and rock solid daily driver reliability. By modifying ignition timing and throttle mapping, optimizing air/ fuel ratios, increasing the engines rev limiter and modifying boost mapping for turbo charged vehicles, RENNtech performance software unleashes your Mercedes true potential. The RENNtech tuning software for Mercedes offers significant gains in horsepower and torque across the vehicles entire power band. Programming takes only a few minutes and the vehicle can be reflashed at any time as many times as you wish. The module plugs directly into the OBD2 port and delivers the file you choose directly to the ECU. Our proprietary tuning module stores both the RENNtech tuned file and your vehicles stock file. ![]() RENNtech HHT (hand held tuner) allows you the unlimited ability to switch between tuned and stock ECU programming and requires no ECU removal! ![]()
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