Volvo XC90: Starting and driving / Activating and deactivating Hill Descent Control using the function button
(Option/accessory.)
There is a function button for assistance on steep gradients with Hill
Descent Control in the center display's Function view if the vehicle is not
equipped with a drive mode control in the tunnel console.
Selecting Hill Descent Control in the center display's Function view
HDC only works at low speeds.
- Tap the Hill Descent Control button to activate or deactivate the function.

- An indicator light in the button will illuminate when the function is
activated.
When the engine is switched off, the function will be automatically deactivated.
NOTE
The function is deactivated when driving at high speeds and must be reactivated
at lower speeds if so desired.
(Option/accessory.)
The function for assisting when driving downhill (HDC1) is a low-speed
function with increased engine braking. The function makes it possible to increase
or decrease the vehicle's speed on steep downhill gradients by only using the accelerator
pedal, without applying the brakes...
A more economical driving style can help lower fuel consumption.
Before driving
If possible, precondition the vehicle before driving.
If preconditioning is not possible when it is cold outside, use seat and
steering wheel heating first...
Other information:
The cover can be used in two positions: fully open to completely cover the
cargo compartment or partially retracted to make it easier to reach further into
the cargo compartment.
Fully open
7-seat models
Hang the third-row seat belt latches in the hooks provided in the side panels...
City Safety1 can help prevent a collision or lower the vehicle's speed
at the point of impact. The function consists of several subfunctions.
Ability to reduce speed
If the difference in speed between your vehicle and the obstacle is greater than
the speeds specified below, the City Safety auto-brake function cannot prevent a
collision, but it can help mitigate its effects...