Volvo XC90: Starting and driving / Activating and deactivating Eco drive mode using the function button
There is a function button for Eco drive mode in the center display's Function
view if the vehicle is not equipped with a drive mode control in the tunnel console.
When the engine is switched off, Eco mode is deactivated and must therefore be
reactivated each time the engine is started. ECO will be displayed in the
instrument panel when the function is activated.
Selecting Eco drive mode in the center display's Function view
Tap the Driving Mode ECO button to activate or deactivate the function.

An indicator light in the button will illuminate when the function is activated.
Eco drive mode can help make driving more fuel-efficient and eco-friendly.
Use this mode to save fuel and promote ecofriendly driving.
When Eco mode is activated, the following characteristics are modified:
The automatic transmission's shifting points...
Start/Stop is a function that temporarily switches off the engine when the
vehicle has stopped, e.g. at a traffic light or in heavy traffic, and then starts
it again automatically when needed...
Other information:
(Option/accessory.)
Adaptive Cruise Control (ACC1) may have limited functionality in
certain situations.
Steep roads and/or heavy loads
Adaptive Cruise Control is primarily intended to be driven on flat roads. The
function may not be able to maintain the correct time interval to the vehicle ahead
when driving down steep hills...
Home view consists of four tiles: Navigation, Media, Phone and
a fourth tile. These views can be expanded.
Expanding a tile from standard mode
Standard mode and expanded mode of a tile in the center display.
Expanding a tile:
For tiles Navigation, Media and Phone: Tap the screen anywhere in the tile...