01 / CONTROL
01
MAP SWITCHING
Access and switch between supported calibrations for different driving or fuel setups, where available for your vehicle.
KAY TUNING / ADVANCED FEATURES
KAY ULTRA.
ADVANCED FEATURES. STANDARD.
Map switching, flex fuel and anti-lag. Included with compatible KAY tuning licenses. Built for drivers who want more control.
EXPLORE LICENSES ↗MAP SWITCHINGFLEX FUELANTI-LAG
THE FEATURES
MORE CONTROL. BUILT IN.
02 / FUEL
02
FLEX FUEL
On supported builds with the required hardware and calibration, adjust performance for changing ethanol content.
03 / PERFORMANCE
03
ANTI-LAG
Advanced turbo response control on supported vehicles and calibrations. Requires appropriate configuration and responsible operation.
YOUR TUNER. YOUR SETUP.01 / MAPS 02 / FUEL 03 / RESPONSE
KAY ULTRA. CUSTOMIZED BY YOUR TUNER.
KAY isn't limited to preset tuning maps. On supported platforms, your preferred independent tuner can build compatible custom calibrations and configure KAY Ultra features around your specific setup.
MAP SWITCHING
Choose and configure supported map-switching options for different driving setups or performance goals.
FLEX FUEL
Customize supported flex-fuel calibration and ethanol blending strategies around the fuel system and hardware in your car.
ANTI-LAG
Adjust supported anti-lag settings as part of your custom calibration, within the vehicle's hardware and operating limits.
Feature customization depends on vehicle support, firmware, hardware and tuner calibration. Features are not available on every AMG.
NO EXTRA PACKAGE
ULTRA IS INCLUDED.
Map switching, flex fuel and anti-lag are part of KAY Ultra at no additional feature-license charge on supported vehicles. Availability and required hardware vary by platform.
SEE AVAILABLE LICENSES ↗COMPATIBILITY
BUILT FOR SUPPORTED PLATFORMS.
KAY Ultra features depend on the vehicle, ECU/TCU software, calibration, and required supporting hardware. Not every feature is supported on every AMG. Check the relevant product listing before purchasing.
SUPPORT
QUESTIONS, ANSWERED.
Is KAY Ultra an additional purchase?+
No. Supported KAY Ultra features are included as standard with compatible KAY tuning licenses.
Does every Mercedes-AMG support all Ultra features?+
No. Map switching, flex fuel and anti-lag availability depends on the exact vehicle, software, hardware and calibration.
Do I need extra hardware for flex fuel?+
Some supported configurations require a compatible ethanol-content sensor and other supporting hardware. Check your specific product's compatibility details.
Can I use a custom tune?+
KAY supports flashing compatible custom tuning files from your preferred independent tuner where available. Feature configuration depends on that calibration.