SKU: U-EF-PLUS
eFlexFuel eFlexPlus E85 Flex Fuel Conversion Kit Mercedes C63 AMG M156
The eFlexFuel eFlexPlus E85 Flex Fuel Kit is the best plug-and-play E85 conversion for Mercedes-Benz C63 AMG M156 owners wanting to run any blend of E85 and gasoline. This fully automatic system adjusts fueling in real-time via smartphone app, delivers increased power and cooler temps on E85, and installs without touching the factory ECU or triggering check engine lights.
Key Features
- Fully Automatic: No tuning or map switching, seamlessly runs E0 to E85 blends
- eFlexApp Control: Smartphone app for Eco/Dynamic/Sport modes, cold start adjustment, ethanol monitoring, and more
- Under-Hood Install: Clean installation preserves factory wiring and OBD functionality
- Performance Gains: More power, lower operating temperatures, and reduced emissions on E85
Specifications
| Specification | Detail |
|---|---|
| Part Number | U-EF-PLUS |
| Compatibility | Any Ethanol Blend E0-E85 |
| Control | Bluetooth eFlexApp (iOS/Android) |
| Installation | Under-Hood, No ECU Modification |
| Engine | 6.2L M156 V8 |
| Country of Origin | Finland |
| Warranty | 5-Year with Registration |
Product Notes
- Complete DIY kit, for high-power builds with upgraded injectors, consider eFlexPro for custom tuning
Installation Notes
- Estimated time: 2-4 hours, moderate difficulty, fuel line modification required
- Plug-and-play wiring with quick couplers, detailed instructions included
This Part Fits
| Year | Make | Model | Notes |
|---|---|---|---|
| 2008-2014 | Mercedes-Benz | C63 AMG | 6.2L M156 V8 |
Why Choose eFlexFuel?
- Finnish-engineered leader in flex fuel conversion with advanced Bluetooth control
- Premium components for reliable E85 performance and power gains
- Extended 5-year warranty with registration and free support
Frequently Asked Questions
- Q: Does this require tuning?
A: No, fully automatic, runs any blend without map changes or ECU flash. - Q: Will it trigger a check engine light?
A: No, installs parallel to factory system without altering OEM data. - Q: How much power gain on E85?
A: Significant increases in power and torque with cooler operating temps. - Q: Is it reversible?
A: Yes, completely removable with no permanent modifications.
Shipping & Handling
- Method: UPS/FedEx Ground
- Availability: In stock, ships same or next business day
- Packaging: Official eFlexFuel retail box
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