A plug-and-play, fully automatic E85 flex-fuel conversion kit for Mercedes-AMG gasoline engines. Safely run E85, regular gasoline, or any mixture of the two — with more horsepower and torque, cooler operating temperatures, and lower emissions. Installs under the hood without touching your factory ECU or OBD, and won't trigger a check engine light. The free Flex-Fuel Commander app (Android) lets you monitor ethanol content, air-fuel ratios, and duty cycle, and switch driving modes from your phone. Power Gains (E85) Mercedes E55 AMG: ~30 HP and ~20 lb-ft on a modified car Mercedes C63 AMG: ~30 HP and ~18 lb-ft Results vary with vehicle condition, supporting modifications, and ethanol content. Fuel System Requirements by Platform 63 AMG and 500 / 55 NA: compatible with stock injectors and fuel pumps — unless you have upgraded headers or a supercharger. If your car has headers, we recommend high-flow injectors (ask us for the correct spec). 55K AMG: requires larger injectors (1050cc recommended) plus an E85-compatible high-flow fuel pump (AEM 320LPH or Walbro 450LPH class). 32K AMG: requires larger injectors (630cc recommended) plus an E85-compatible high-flow fuel pump (AEM 320LPH or Walbro 450LPH class). Not sure what your setup needs? Send us your VIN and mod list and we'll spec the correct injectors and pump for you. Standard Features Drive on E85, gasoline, or any blend of the two Fully automatic — no tuning, map changes, or adjustments required Eco, Dynamic & Sport driving modes, adjustable cold-start fueling, ethanol and duty-cycle monitoring via the app Under-the-hood install that doesn't touch your factory ECU or OBD, and won't trigger a CEL We verify your vehicle's E85 compatibility (injectors, fuel pump, fuel lines, and modifications) Everything needed to run E85 and DIY-install is included More power, lower operating temps, and reduced emissions on E85 Pro Features (everything in Standard, plus) Patent-pending virtual load-sensor tuning — no tapping into external load sensors Connect to two OEM or external engine sensors (MAF, MAP, TPS, or WBO) Build your own E85 tunes with fully adjustable fuel maps via PC software Adds a Custom driving mode on top of Eco / Dynamic / Sport Choosing your module: Standard is the plug-and-play option. Pro adds custom fueling maps, start-up fuel enrichment, and virtual load data. Both include Wi-Fi for the app. Installation DIY-friendly under-hood install. The kit includes the necessary adapters for your injector harness and US-car-type injectors. This kit does NOT include injectors — you are selecting injector harness type only. If you're running other connectors on your injectors, email us first at [email protected] and we'll confirm the right harness. Fitment Compatibility Mercedes-AMG E55 Mercedes-AMG SL55 Mercedes-AMG S55 Mercedes-AMG CLS55 Mercedes-AMG G55 Mercedes-AMG CL55 Mercedes-AMG SLR Mercedes-AMG C63 Mercedes-AMG E63 Buy With Confidence Free U.S. shipping with tracking on all orders. Compatibility verified before you buy: send us your VIN and mod list and we'll confirm your injectors, pump, and harness before you order. Mercedes-AMG specialists: we set these kits up for AMG platforms specifically — not generic guesswork. Real support: questions before or after purchase go straight to us. Confirm fitment or ask a question →
