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)
The fog lights can be activated manually when driving in fog and are activated
automatically when backing up to help augment the backup light.
If the vehicle is equipped with corner illumination *, the fog lights are
activated automatically in weak daylight or dark conditions to illuminate the area
diagonally in front of the vehicle...
(Option/accessory.)
(Depending on market, this function can be either standard or optional.)
A summary of how Pilot Assist is controlled using the right-side steering
wheel keypad and how the function is shown in the display.
Function buttons and symbols...