2016 - 2020 Mercedes Benz GLE550 - M278 V8 Bi-turbo 4.7L - Performance ECU Tuning ECU Tuning Stage:M278 Stage 1 Performance Tune providing precise control over the

providing precise control over the high-performance inline-six engine used in the M3 of this generation

Good way to work around a faulty ews system (bad key/failed EWS module)

Make sure to match your E31 DME with this Bosch Part Number on the sticker: 0261203474

ensuring flawless functionality

Workarounds for faulty EWS systems

2016 - 2020 Mercedes Benz GLE550 - M278 V8 Bi-turbo 4.7L - Performance ECU Tuning ECU Tuning Stage:M278 Stage 1 Performance Tune providing precise control over thePerformance Flash Tune for Mercedes Benz GLE550 W166 with M278 4. 7L V8 Bi Turbo Engine with MED17. 7. 1 MED17. 7. 3 ECU. GLE550 M278 Stage 1 Performance Tune 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