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 driver support systems Adaptive Cruise Control* and Pilot Assist* can
help alert the driver if the distance to the vehicle ahead suddenly decreases to
an unsafe distance.
Collision warning audible signal and symbol
Audible signal at risk of collision
Collision warning symbol
Camera/radar sensor distance monitoring
Adaptive Cruise Control and Pilot Assist use approx...
The clock is displayed in both the instrument panel and the center display.
Location of clock
Location of clock in 12" * and 8" instrument panels. The illustration
is generic - details may vary according to vehicle model.
Certain messages and other information may obscure the clock in the instrument
panel...