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:
(Depending on market, this function can be either standard or optional.)
Adaptive Cruise Control (ACC2) can be deactivated and switched
off.
Press the button on the steering
wheel (1).
The symbol and markings turn gray – Adaptive Cruise Control goes into
standby mode...
(Option/accessory.)
With CarPlay1, you can listen to music, make phone calls, get driving
instructions, send/ receive messages and use Siri, all while remaining focused on
driving.
CarPlay works with select iOS devices.
If the car does not already support CarPlay, this can be retrofitted...