Mercedes-AMG M157 V8 Spool Wireless Ethanol Analyzer Kit & Filter

The Spool wireless ethanol analyzer kit for the Mercedes-AMG M157 V8 shows your in-tank ethanol percentage and fuel temperature live on your phone.

Why you need it

Under ASTM guidelines, fuel sold as E85 can contain anywhere from 51% to 85% ethanol. Running a lower ethanol blend on a tune built for more can damage your engine. Knowing your exact ethanol content lets you blend and tune with confidence.

Fits

• Mercedes-AMG models with the M157 5.5L twin-turbo V8

What's included

• Spool wireless ethanol analyzer module (Bluetooth 4.0 low energy)
• GM ethanol content sensor
• Free Spool phone app with ethanol mix calculator
• Spool 10-micron fuel filter unit, flows up to 6 GPM

Good to know

Confirm your engine code before ordering. The analyzer uses Bluetooth low energy, so it barely touches your phone battery and leaves your other Bluetooth connections alone. Fuel temperature reads in Fahrenheit. The app is free and its mix calculator also works without the kit.