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 functions Adaptive Cruise Control* and Pilot Assist* have
a special brake function in slow traffic and while stationary. In certain situations,
the parking brake will be applied to keep the vehicle at a standstill.
Braking function in slow traffic and at a standstill
In slow-moving, stop-and-go traffic or when stopped at a traffic light, driving
will resume automatically if t..
(Option/accessory)
The seats can be heated for added comfort for the driver and passengers in
cold weather.
Activating and deactivating the heated rear seats from the front seats*
Tap the symbol in the center
of the climate bar to open Climate view in the center display.
Select the Rear climate tab.
Tap the seat heating button
repeatedly to select one of the four levels: Off, High, Medi..