RennTech Bench Flash Tuning

Many ECU's can only be flashed in "boot mode" which requires the ECU to be removed from the vehicle.  Once removed from the vehicle, the cover is taken off and we utilize electronic bungy pins to connect to the circuit board to read the cars data.  The ECU must be sent in to us which we can then bench flash the car and send the ECU back out to you.

#1 priority is our customer service to you! Our tuning is used worldwide. We can provide you a tuned file no matter the environment you live in. Upon ordering of this ECU Flash Tune, you will be required to send in your ECU.  Once we receive the ECU and program it, we will ship it back to you via the method you select at checkout.  This ECU cannot be flashed via the OBDII port.  This requires the ECU to be mailed in to us to be benched flashed.  Bench flashing requires the ECU to be opened.  We DO NOT solder or modify your board in any way.  Using a electrical contact pins, we tie into the boards programming mode to read and write the file.  We do store your stock file if you ever want to revert.  Because the ECU must be removed and opened, if you are concerned with warranty, you may want to speak with your dealership.  Removing the ECU takes about 20 mins.

RENNTECHs philosophy has always been to produce products without compromise, and that dedication continues to this day. True to Mercedes-Benz quality, RENNTECH cars are designed to be fast yet refined. Regardless of specification, they run faultlessly, idle smoothly, and have reliability and ease of maintenance comparable to the stock Mercedes-Benz. This attention to detail has made RENNTECH the choice of some of the most discriminating enthusiasts in the world.

	Name	View more
	RennTech ECU Upgrade Mercedes-Benz CLS63 11-13  Model Number: ECU:54.218.CLS63BT   View Price With custom software that is at the cutting edge of tuning technology, RENNtech has inspired some of the most advanced software upgrades on the market today. RENNtech customers experience improved throttle response, more aggressive transmission shift patterns, increased speeds, and (of course) more power. Designed to optimize every aspect of a vehicles performance, increasing low-end torque for better off-the-line performance and enhancing fuel economy in some applications.Features:16 HP gain20 ...
	RennTech ECU Upgrade Mercedes-Benz CLK63 AMG 06-09  Model Number: ECU:54.209.CLK63   View Price With custom software that is at the cutting edge of tuning technology, RENNtech has inspired some of the most advanced software upgrades on the market today. RENNtech customers experience improved throttle response, more aggressive transmission shift patterns, increased speeds, and (of course) more power. Designed to optimize every aspect of a vehicles performance, increasing low-end torque for better off-the-line performance and enhancing fuel economy in some applications.Features:27 HP gain20 ...
	RennTech ECU Upgrade Mercedes-Benz C55 AMG 03-07  Model Number: ECU:54.203.C55   View Price With custom software that is at the cutting edge of tuning technology, RENNtech has inspired some of the most advanced software upgrades on the market today. RENNtech customers experience improved throttle response, more aggressive transmission shift patterns, increased speeds, and (of course) more power. Designed to optimize every aspect of a vehicles performance, increasing low-end torque for better off-the-line performance and enhancing fuel economy in some applications.Features:25 HP gain40 ...
	RennTech ECU Upgrade Mercedes-Benz GL550 06-11  Model Number: ECU:54.164.GL550   View Price With custom software that is at the cutting edge of tuning technology, RENNtech has inspired some of the most advanced software upgrades on the market today. RENNtech customers experience improved throttle response, more aggressive transmission shift patterns, increased speeds, and (of course) more power. Designed to optimize every aspect of a vehicles performance, increasing low-end torque for better off-the-line performance and enhancing fuel economy in some applications.Features:20 HP gain14 ...
	RENNtech ECU Upgrade Mercedes-Benz CLA 45 AMG 14-15+  Model Number: ECU:54.117.CLA45   View Price With custom software that is at the cutting edge of tuning technology, RENNtech has inspired some of the most advanced software upgrades on the market today. RENNtech customers experience improved throttle response, more aggressive transmission shift patterns, increased speeds, and (of course) more power. Designed to optimize every aspect of a vehicles performance, increasing low-end torque for better off-the-line performance and enhancing fuel economy in some applications.Features:18 HP gain16 ...
	RennTech ECU Upgrade Mercedes-Benz CL63 AMG 07-11  Model Number: ECU:54.216.CL63   View Price With custom software that is at the cutting edge of tuning technology, RENNtech has inspired some of the most advanced software upgrades on the market today. RENNtech customers experience improved throttle response, more aggressive transmission shift patterns, increased speeds, and (of course) more power. Designed to optimize every aspect of a vehicles performance, increasing low-end torque for better off-the-line performance and enhancing fuel economy in some applications.Features:10 HP gain26 ...
	RennTech ECU Upgrade Mercedes-Benz C350 08-14  Model Number: ECU:54.204.C350   View Price With custom software that is at the cutting edge of tuning technology, RENNtech has inspired some of the most advanced software upgrades on the market today. RENNtech customers experience improved throttle response, more aggressive transmission shift patterns, increased speeds, and (of course) more power. Designed to optimize every aspect of a vehicles performance, increasing low-end torque for better off-the-line performance and enhancing fuel economy in some applications.Features:20 HP gain14 ...
	RennTech ECU Upgrade Bentley Continental Flying Spur 05-10  Model Number: ECUBTL:54.CONT.GTFS   View Price With custom software that is at the cutting edge of tuning technology, RENNtech has inspired some of the most advanced software upgrades on the market today. RENNtech customers experience improved throttle response, more aggressive transmission shift patterns, increased speeds, and (of course) more power. Designed to optimize every aspect of a vehicles performance, increasing low-end torque for better off-the-line performance and enhancing fuel economy in some applications.Features:16 HP gain20 ...
	RennTech ECU Upgrade Mercedes-Benz CLK55 AMG 02-06  Model Number: ECU:54.209.CLK55   View Price With custom software that is at the cutting edge of tuning technology, RENNtech has inspired some of the most advanced software upgrades on the market today. RENNtech customers experience improved throttle response, more aggressive transmission shift patterns, increased speeds, and (of course) more power. Designed to optimize every aspect of a vehicles performance, increasing low-end torque for better off-the-line performance and enhancing fuel economy in some applications.Features:40 HP gain22 ...
	RennTech ECU Upgrade Mercedes-Benz CLK63 Black Series 07-09  Model Number: ECU:54.209.CLK63B   View Price The RennTech proprietary ECU upgrade for the Mercedes M157 engine offers huge gains in performance across the entire RPM range without sacrificing around town comfort or daily driver reliability. Their ECU tune offers the biggest performance gains on the market; increasing performance from 556 HP and 550 lb/ft torque, to an astonishing 669 HP and 734 lb/ft at the crank! This allows the CLS 63 to run the quarter mile in an impressive 11.37 seconds at 125.01 mph with 0-60 mph coming in a mere 3.4 ...
	RennTech ECU Upgrade Mercedes-Benz ML550 06-11  Model Number: ECU:54.164.ML550   View Price With custom software that is at the cutting edge of tuning technology, RENNtech has inspired some of the most advanced software upgrades on the market today. RENNtech customers experience improved throttle response, more aggressive transmission shift patterns, increased speeds, and (of course) more power. Designed to optimize every aspect of a vehicles performance, increasing low-end torque for better off-the-line performance and enhancing fuel economy in some applications.Features:18 HP gain16 ...
	RennTech ECU Upgrade Mercedes-Benz ML350 06-11  Model Number: ECU:54.164.ML350   View Price With custom software that is at the cutting edge of tuning technology, RENNtech has inspired some of the most advanced software upgrades on the market today. RENNtech customers experience improved throttle response, more aggressive transmission shift patterns, increased speeds, and (of course) more power. Designed to optimize every aspect of a vehicles performance, increasing low-end torque for better off-the-line performance and enhancing fuel economy in some applications.Features:18 HP gain16 ...
	RennTech Stage 1 ECU Upgrade Mercedes-Benz C63 AMG 08-14  Model Number: ECU:54.204.C63   View Price With custom software that is at the cutting edge of tuning technology, RENNtech has inspired some of the most advanced software upgrades on the market today. RENNtech customers experience improved throttle response, more aggressive transmission shift patterns, increased speeds, and (of course) more power. Designed to optimize every aspect of a vehicles performance, increasing low-end torque for better off-the-line performance and enhancing fuel economy in some applications.Features:25 HP gain19 ...
	RennTech ECU Upgrade Mercedes-Benz CL550 07-11  Model Number: ECU:54.216.CL550   View Price ...
	RennTech ECU Upgrade Mercedes-Benz E550 03-08  Model Number: ECU:54.211.E550   View Price With custom software that is at the cutting edge of tuning technology, RENNtech has inspired some of the most advanced software upgrades on the market today. RENNtech customers experience improved throttle response, more aggressive transmission shift patterns, increased speeds, and (of course) more power. Designed to optimize every aspect of a vehicles performance, increasing low-end torque for better off-the-line performance and enhancing fuel economy in some applications.Features:20 HP gain14 ...
	RennTech ECU Upgrade Mercedes-Benz CLK550 06-10  Model Number: ECU:54.209.CLK550   View Price With custom software that is at the cutting edge of tuning technology, RENNTECH has inspired some of the most advanced software upgrades on the market today. RENTECH customers experience improved throttle response, more aggressive transmission shift patterns, increased speeds, and (of course) more power. Designed to optimize every aspect of a vehicles performance, increasing low-end torque for better off-the-line performance and enhancing fuel economy in some applications.Features:22 HP gain20 L...
	RennTech ECU Upgrade Mercedes-Benz E63 AMG 09-11  Model Number: ECU:54.212.E63   View Price With custom software that is at the cutting edge of tuning technology, RENNtech has inspired some of the most advanced software upgrades on the market today. RENNtech customers experience improved throttle response, more aggressive transmission shift patterns, increased speeds, and (of course) more power. Designed to optimize every aspect of a vehicles performance, increasing low-end torque for better off-the-line performance and enhancing fuel economy in some applications.Features:11 HP gain14 ...
	RennTech ECU Upgrade Mercedes-Benz ML320 CDI 06-11  Model Number: ECU:54.164.ML320CDI   View Price With custom software that is at the cutting edge of tuning technology, RENNtech has inspired some of the most advanced software upgrades on the market today. RENNtech customers experience improved throttle response, more aggressive transmission shift patterns, increased speeds, and (of course) more power. Designed to optimize every aspect of a vehicles performance, increasing low-end torque for better off-the-line performance and enhancing fuel economy in some applications.Features:22 HP gain20 ...
	RennTech ECU Upgrade Mercedes-Benz ML63 AMG 06-11  Model Number: ECU:54.164.ML63   View Price With custom software that is at the cutting edge of tuning technology, RENNtech has inspired some of the most advanced software upgrades on the market today. RENNtech customers experience improved throttle response, more aggressive transmission shift patterns, increased speeds, and (of course) more power. Designed to optimize every aspect of a vehicles performance, increasing low-end torque for better off-the-line performance and enhancing fuel economy in some applications.Features:18 HP gain16 ...
	RennTech ECU Upgrade Mercedes-Benz CLS500 2006  Model Number: ECU:54.219.CLS500   View Price With custom software that is at the cutting edge of tuning technology, RENNtech has inspired some of the most advanced software upgrades on the market today. RENNtech customers experience improved throttle response, more aggressive transmission shift patterns, increased speeds, and (of course) more power. Designed to optimize every aspect of a vehicles performance, increasing low-end torque for better off-the-line performance and enhancing fuel economy in some applications.Features:22 HP gain42 ...
	RennTech ECU Upgrade Mercedes-Benz SL550 11-13  Model Number: ECU:54.231.SL550BT   View Price With custom software that is at the cutting edge of tuning technology, RENNtech has inspired some of the most advanced software upgrades on the market today. RENNtech customers experience improved throttle response, more aggressive transmission shift patterns, increased speeds, and (of course) more power. Designed to optimize every aspect of a vehicles performance, increasing low-end torque for better off-the-line performance and enhancing fuel economy in some applications.Features:16 HP gain19 ...
	RennTech ECU Upgrade Mercedes-Benz G500 98-08  Model Number: ECU:54.463.G500   View Price With custom software that is at the cutting edge of tuning technology, RENNtech has inspired some of the most advanced software upgrades on the market today. RENNtech customers experience improved throttle response, more aggressive transmission shift patterns, increased speeds, and (of course) more power. Designed to optimize every aspect of a vehicles performance, increasing low-end torque for better off-the-line performance and enhancing fuel economy in some applications.Features:23 HP gain20 ...
	RennTech ECU Upgrade Mercedes-Benz SLK350 04-11  Model Number: ECU:54.171.SLK350   View Price With custom software that is at the cutting edge of tuning technology, RENNTECH has inspired some of the most advanced software upgrades on the market today. RENNTECH customers experience improved throttle response, more aggressive transmission shift patterns, increased speeds, and (of course) more power. Designed to optimize every aspect of a vehicle's performance, increasing low-end torque for better off-the-line performance and enhancing fuel economy in some applicationsFeatures:128 HP gai...
	RennTech ECU Upgrade Mercedes-Benz S55 AMG 01-02  Model Number: ECU:54.220.S55   View Price With custom software that is at the cutting edge of tuning technology, RENNtech has inspired some of the most advanced software upgrades on the market today. RENNtech customers experience improved throttle response, more aggressive transmission shift patterns, increased speeds, and (of course) more power. Designed to optimize every aspect of a vehicles performance, increasing low-end torque for better off-the-line performance and enhancing fuel economy in some applications.Features:22 HP gain20 ...
	RennTech ECU Upgrade Mercedes-Benz SLS AMG 11-14  Model Number: ECU:54.197.SLS   View Price With custom software that is at the cutting edge of tuning technology, RENNtech has inspired some of the most advanced software upgrades on the market today. RENNtech customers experience improved throttle response, more aggressive transmission shift patterns, increased speeds, and (of course) more power. Designed to optimize every aspect of a vehicles performance, increasing low-end torque for better off-the-line performance and enhancing fuel economy in some applications.Features:14 HP gain11 ...