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Performance Flash Tune for Mercedes Benz S550 C217 with M278 4
Replacement ECU: A compatible donor ECU with matching part numbers
Our cloning process transfers all critical data from your original ECU to a compatible donor unit
Dyno RPM limiter is disabled
Plug & Play Ready: The cloned ECU will work immediately with your vehicle and original keys
2011 - 2013 Mercedes Benz S550 - M278 V8 Bi-turbo 4.7L - Performance ECU Tuning Misc Performance Flash Tune for MercedesPerformance Flash Tune for Mercedes Benz S550 W221 with M278 4. 7L V8 Bi Turbo Engine with MED17. 7. 1 MED17. 7. 3 ECU. S550 M278 Performance Flash Tune Stage 1 gains: 76WHP @ 3500RPM 118WTQ @ 3500RPM Performance tuning modifies torque limiter maps, boost levels, fuel maps, ignition timing advance maps and more. All to help safely increase HP TQ, while keeping good drive ability and factory fail safes limp protection in place. Factory emissions remain
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