RENNtech logo NEW small v2b

RENNtech | ECU Upgrade | C 450 BiTurbo AMG | W205 | 402HP/454LB-FT | 3.0L V6 | M276

RENNtech ECU Upgrade for 205 - C 450 BiTurbo AMG 4-MATIC. Up to 402HP and 454LB-FT. Gains: +40HP & +70LB-FT
SKU: ECU:54.205W.C450BT
Retail price without tax: $2,240.00

RENNtech M276 Biturbo ECU Upgrades are TÜV approved!

Online Store Button

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 reflashed at any time as many times as you wish.

Our proprietary ECU upgrade for the Mercedes M276 engine offers huge gains in performance across the entire RPM range without sacrificing around town comfort or daily driver reliability.

Our ECU tune offers the biggest performance gains on the market with our dyno results increasing performance from 362 HP and 384 lb/ft torque, up to an astonishing 402 HP and 454 lb/ft at the crank!

Performance Tests:
Vehicle Upgrades 0-60mph 0-100mph 60-130mph 1/4 Mile ET Trap Speed
W205 - C450 AMG Sport Sedan

Stock w/o Launch Control

4.69 sec 11.63 sec 16.08 sec 13.25 sec 106 mph
W205 - C450 AMG Sport Sedan Rt ECU Upgrade w/o Launch Control 4.35 sec 10.78 sec 14.54 sec 12.89 sec 109 mph
*If not otherwise noted, performed on non-prepped asphalt and with OEM, Street-Legal and/or Non-Performance tires. Data measured with Racelogic Performance Box.

Performance Numbers Overview 


C 450 AMG BiTurbo (W205 - M276 Biturbo 4-MATIC Engine) Stock Performance:

  • 362 hp @ 5,500-6,000 RPM; 384 lb-ft @ 2,000-4,200 RPM
  • Note: Mercedes M276 engine performance when measured obtains higher numbers that rated from factory.


C 450 AMG BiTurbo (W205 - M276 Biturbo 4-MATIC Engine) Modified Performance:

  • 402 hp @ 5,300 RPM; 454 lb-ft @ 3,200 RPM

For detailed explanation on crank HP, wheel HP, drivetrain loss, etc. please click here.



Contact us

7825 SW Ellipse Way, Stuart, FL 34997
(+1) 561 - 845 7888
Mon - Fri 9am - 6pm


© 2017 RENNtech, Inc. All Rights Reserved.
7825 SW Ellipse Way - Stuart, FL 34997
TEL: 561.845.7888 FAX: 561.845.6777 E-MAIL: