{"product_id":"renntech-ecu-upgrade-w222-s-550-540hp-705tq-4-7l-v8-biturbo-m278","title":"RENNtech ECU+ Upgrade | W222 | S 550 | 540HP \/ 705TQ | 4.7L V8 BiTurbo | M278","description":"RENNtech HHT (hand held tuner) allows you the unlimited ability to switch between tuned and stock ECU programming and requires no ECU removal!\u003cbr\u003e\u003cbr\u003eOur 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.\u003cbr\u003e\u003cbr\u003eOur proprietary ECU upgrade for the Mercedes M278 Biturbo engine offers huge gains in performance across the entire RPM range without sacrificing around town comfort or daily driver reliability.\u003cbr\u003e\u003cbr\u003eWith the newest update of their Software Upgrade for the M278 – 4.7L V8 BiTurbo, RENNtech boosts the 550-Series to AMG Power Levels. The RENNtech upgraded M278 now produces up to 540 HP and 705 LB-FT at crank.\u003cbr\u003e\u003cbr\u003eCompared to power numbers by Mercedes-Benz, the S 550 gains up to 66 HP and 139 LB-FT. This Software update delivers up to 10 HP and 99 LB-FT more than the previous version.\u003cbr\u003e\u003cbr\u003eThe vast amount of increased torque across the entire RPM range gives the 550 an extra edge to compete with AMG powered vehicles. All this without sacrificing around town comfort and daily driver reliability.\u003cbr\u003e\u003cbr\u003e \u003cbr\u003e\u003cbr\u003e \u003cbr\u003e\u003cbr\u003eNotes:\u003cbr\u003e\u003cbr\u003eWe have found the M278 engine stock performance numbers vary from the baseline figures claimed by Mercedes Benz. We typically see higher baseline numbers than claimed by the factory.\u003cbr\u003ePower gains are calculated based on stock numbers measured by RENNtech. Crank Performance Numbers are calculated with a 17% Drivetrain loss on 4MATIC vehicles.\u003cbr\u003eOur numbers will be dependent on conditions and fuel quality. 93+ Octane gasoline is mandatory with this Performance Upgrade.\u003cbr\u003eStates known for poor fuel quality have to be supplied with a lower power setup. Please call for details and Race fuel options +1-561-845-7888.","brand":"RennTech","offers":[{"title":"Default Title","offer_id":51929793593636,"sku":"54.222.S550BT","price":2480.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0671\/6801\/0532\/files\/RennTech_Performance_Ecu_Upgrade_For_Mercedes-Benz_GL_550_-_AutoTalent_a9a78599-2a98-4a61-bdaa-7091886af8f9.jpg?v=1768442836","url":"https:\/\/autohousesupply.com\/products\/renntech-ecu-upgrade-w222-s-550-540hp-705tq-4-7l-v8-biturbo-m278","provider":"AutoHouseSupply","version":"1.0","type":"link"}