RENNtech | HHT | ECU Upgrade | SLS AMG GT | C197 | 593HP/495LB-FT | 6.3L V8 N/A | M159 mercedes-benz-s-class--220---1999-2006--s-600--1999-2002--esr7119407 With the proprietary RENNtech ECU

With the proprietary RENNtech ECU Tuning the W213 - E63 AMG S 4MATIC+ gains up to +82 HP and +84LB-FT based on power numbers measured by RENNtech

CLASS E (W 212) 350 4-matic [2 Filters Required] (HP: 272 | Year: 09 > 11)

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RENNtech ECU Upgrade for the Mercedes-Maybach 222 - S 600 BiTurbo V12

RENNtech | HHT | ECU Upgrade | SLS AMG GT | C197 | 593HP/495LB-FT | 6.3L V8 N/A | M159 mercedes-benz-s-class--220---1999-2006--s-600--1999-2002--esr7119407 With the proprietary RENNtech ECURENNtech HHT ECU Upgrade for 197 SLS AMG GT. Up to 593HP and 495LB FT. Gains: +10HP & +14LB 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