The phrase "tilt function" refers to a feature or option that allows something to be adjusted or tilted in a particular direction or angle. Full definition
The base model also gets power steering with tilt function, all 4 power windows and height adjustable driver seat. (auto.ndtv.com)
You'll also use the microphone and tilt functions in ways that I won't spoil. (darkstation.com)
The driver could select curve tilting function with the three position ABC switch which is active between 15 and 180 km / h in Curve mode. (mercedesblog.com)