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:
Activating and deactivating
An integrated compass1 in the upper right corner of the rearview
mirror shows the direction the vehicle is traveling.
The compass is automatically activated when the vehicle is started.
To deactivate/activate the compass manually:
Use a paper clip or similar object to press the button on the bottom of
the mirror...
The Whiplash Protection System (WHIPS) is designed to help reduce the risk
of whiplashtype injuries. The system consists of energy absorbing backrests and
seat cushions as well as specially designed head restraints in the front seats.
WHIPS is activated in the event of a rear-end collision and adapted to the angle
and speed of the collision and to the characteristics of the colliding vehicle...