RENNtech ECU+ Upgrade | C253 | GLC63 (S) AMG 4MATIC+ Coupe | 601 HP/644LB-FT | 4.0L V8 BiTurbo | M177 | MY2016+ porsche-panamera--971---2016-2024--turbo-esr5776882 GL550 (X166 | MY2013-16 |

GL550 (X166 | MY2013-16 | AWD | M278 | 4

This process creates a laminate with a precisely controlled resin volume and in turn is 20-30% stiffer and stronger than an equivalent thickness wet laminate process

Installation in less than 10 seconds

Low Bracket Profile SKU: 88

ML 400 BiTurbo (X166 - M276 Biturbo 4-MATIC Engine) Stock Performance:

RENNtech ECU+ Upgrade | C253 | GLC63 (S) AMG 4MATIC+ Coupe | 601 HP/644LB-FT | 4.0L V8 BiTurbo | M177 | MY2016+ porsche-panamera--971---2016-2024--turbo-esr5776882 GL550 (X166 | MY2013-16 |ECU+ Upgrade GLC 63 AMG S and non S Up to 601 HP 644 LB FT Gains: +75 HP & +113 LB FT RENNtech tuning products are certified to meet CARB standards in all 50 States. 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