Volvo S 90 2017, Owner'S Manual

Page: 393 / 570

STARTING AND DRIVING
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* Option/accessory. 391
Using the drive mode control
*
Select the
Off Road
drive mode to activate the
function.
Select any other drive mode to turn it off.
From the center display's Function view
Models without the drive mode
control have a button for
Hill
Descent Control
in the center
display's Function view.
–
Tap the button to activate.
> A light in the button illuminates when the
function is activated.
NOTE
The function is deactivated when driving at
higher speeds and must be reactivated at
lower speeds if so desired.
Related information
•
Brake functions (p. 383)
•
Hill Descent Control (HDC) (p. 391)
•
Drive modes
*
(p. 377)
Hill Descent Control (HDC)
HDC is a type of low-speed automatic engine
brake and makes it possible to increase or
decrease the vehicle's speed on steep downhill
gradients using only the accelerator pedal, with-
out applying the brakes.
HDC is particularly useful when driving down
steep hills with rough surfaces, and where the
road may have slippery patches.
WARNING
HDC does not function in all situations, and is
a supplementary braking aid. The driver has
full responsibility for driving in a safe manner.
Function
HDC allows the vehicle to roll forward or in
reverse at very low speed with enhanced engine
braking. However, speed can be adjusted to a
higher level with the accelerator pedal. When the
accelerator pedal is released, the vehicle will
return to very low speed regardless of the steep-
ness of the hill and without applying the brakes.
The brake lights illuminate when HDC is func-
tioning.
The driver can use the brakes to slow or stop the
vehicle at any time.
8 Not available in all models