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:
Most of the settings for the vehicle's basic apps can be changed directly
in Top view in the center display via contextual settings.
Top view with button for contextual settings.
Contextual setting is a shortcut for accessing specific settings related to the
active function displayed on the screen...
City Safety steering assistance may have limited functionality in certain
situations and not intervene, e.g.:
at speeds outside the range of 50-100 km/h (30-62 mph)
if the driver does not take evasive action
if speed-dependent power steering wheel resistance is working at reduced
power – e...