RENNtech ECU+ Upgrade | C216 | CL 550 | 540HP / 705 LB-FT| 4.7L V8 BiTurbo | M278 | MY2011-2014

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Description

RENNtech ECU+ Upgrade | C216 | CL 550 | 540HP / 705 LB-FT| 4.7L V8 BiTurbo | M278 | MY2011-2014ECU+ Upgrade 540HP 705LB FT Gains: +92HP +167LB FT RENNtech HHT (hand held tuner) allows you the unlimited ability to switch between tuned and stock ECU programming and requires no ECU removal! Our proprietary tuning module stores both the RENNtech tuned file and your vehicles stock file. The module plugs directly into the OBD2 port and delivers the file you choose directly to the ECU. Programming takes only a few minutes and the vehicle can be

Crank Performance Numbers are calculated with a 14% Drivetrain loss on 4MATIC+ vehicles

Continental GT Speed (MY2021+)

RENNtech modifies the OEM Aluminum Lower Control Arms to allow for camber adjustment on lowered cars and cars with performance setup

McLaren GT

RENNtech Carbon Fiber Quality Control

Rated by RENNtech: 605 HP @ 5

Performance

This type of tooling has optimal durability

countless hours of in house research

RENNtech ECU Plus Upgrade for C292 - GLE 43 AMG Coupe

Our ECU tune offers the biggest performance gains on the market with our dyno results increasing performance from 329 HP and 354 lb/ft torque

Exchange/Return Notes