2018 VOLVO S90 brake

SEATS AND STEERING WHEEL
* Option/accessory.187
Using stored memory in a poweredfront seat
The memory function can be used to store the settings for the seat, door mirrors and head-up display *.
Using a stored positionA stored position can be used with the front door open or closed:
Front door open
–Briefly press one of the memory buttons ( 1
or 2). The seat, door mirrors and head-up
display will move and stop at the positions stored in that button.
Front door closed
–Press and hold one of the memory buttons ( 1 or 2) until the seat, door mirrors and
head-up display stop in the positions stored in that memory button.
If the memory button is released, the seat, doormirrors and head-up display will stop moving.
WARNING
• Because the front seats can be adjusted with the ignition off, children should neverbe left unattended in the vehicle.
• Movement of the seat can be STOPPEDat any time by pressing any button on thepower seat control panel.
• Do not adjust the seat while driving.
• The seat should be adjusted so that thebrake pedal can be depressed fully. Inaddition, position the seat as far rearwardas comfort and control allow.
• The seat rails on the floor must not beobstructed in any way when the seat is inmotion.
Related information
• Manual front seats (p. 184)
• Power front seats
* (p. 185)
• Adjusting the power front seats
* (p. 185)
• Storing memory settings in power front seats
* (p. 186)
• Adjusting front seat massage settings
*
(p. 188)
• Adjusting front seat cushion length (p. 189)
• Front seat massage settings
* (p. 188)
• Adjusting front seat side bolster settings
*
(p. 190) •
Adjusting front seat lumbar support
* (p. 190)
• Adjusting the passenger seat from the driv-er's seat
* (p. 191)

DRIVER SUPPORT
* Option/accessory.
262
Driver support systems
The vehicle is equipped with a number of driver support systems that can provide the driver withactive or passive assistance in various situations.
The system can, for example, help the driver maintain a set speed or a set time interval to thevehicle ahead, help prevent a collision by warningthe driver and applying the brakes, or assist thedriver while parking. Some of the systems are standard and others are options. This also varies from market to market.
Related information
• Speed-dependent steering wheel resistance(p. 262)
• Electronic Stability Control (p. 264)
• Stability system Roll Stability Control(p. 263)
• Rear Collision Warning (p. 336)
• Speed limiter (p. 267)
• Cruise control (p. 275)
• Distance Alert
* (p. 280)
• Adaptive Cruise Control
* (p. 284)
• Pilot Assist (p. 300)
• Radar sensor (p. 315)
• Camera (p. 320)
• City Safety
™ (p. 324)
• BLIS
* (p. 337) •
Cross Traffic Alert
* (p. 342)
• Road Sign Information
* (p. 346)
• Driver Alert Control (p. 351)
• Lane Keeping Aid (p. 353)
• Steering assistance at risk of collision(p. 361)
• Park Assist
* (p. 370)
• Park Assist Camera
* (p. 375)
• Park Assist Pilot
* (p. 384)
Speed-dependent steering wheelresistance
Speed-dependent power steering increases the steering wheel resistance in pace with the vehi-cle's speed to give the driver an enhanced feel-ing of control and stability.
Steering may feel stiffer on highways. When parking and at low speeds, it will be easier tomove the steering wheel.
NOTE
In some situations, the power steering may become too hot and require temporary cool-ing – during such time the power steering willwork at reduced output and the steeringwheel may feel more difficult to move. In parallel with the temporarily reduced steer- ing assistance, the driver display shows amessage as well as a STEERING WHEELsymbol.

DRIVER SUPPORT
* Option/accessory.263
WARNING
While the power steering is working at reduced power, the driver support functionswith steering assistance are not available. In such a situation, the driver display shows the
Power steering failure or Power
Steering Assist Temporarily Reduced
message, combined with a STEERING WHEEL symbol.
Changing the level of steering wheel resistance *
To change the level of steering wheel resistance, see the description of the INDIVIDUAL optionunder "Available drive modes" in the "Drivemodes" section. On models not equipped with drive mode con- trols and the INDIVIDUAL option, steering wheelresistance can instead be set in the center dis-play's Top view under:
SettingsMy CarDrive ModesSteering force
Steering wheel resistance settings cannot be accessed when turning at speeds above10 km/h (6 mph).
Related information
•Drive modes
* (p. 413)
• Pilot Assist (p. 300) •
Lane Keeping Aid (p. 353)
• Steering assistance at risk of collision(p. 361)
• Park Assist Pilot
* (p. 384)
Stability system Roll StabilityControl
The Roll Stability Control (RSC 1
) system helps
minimize the risk of a rollover in the event of e.g. a sudden evasive maneuver or if the vehiclebegins to skid.
The RSC system monitors the lateral angle at which the vehicle is leaning and registers anychanges. Using this information, the system cal-culates the likelihood of a rollover. If there is animminent risk of a rollover, Electronic StabilityControl is activated, engine torque is reduced andbrakes are applied to one or more of the wheelsuntil the vehicle has regained stability.
WARNING
The vehicle

DRIVER SUPPORT
264
Electronic Stability ControlThe Electronic Stability Control (ESC 2
) function
helps the driver avoid skidding and improves the vehicle's directional stability.
This symbol will be displayed in the instrument panel when theESC system is intervening. When the ESC has intervened to apply the brakes, a pulsingsound may be heard and the
vehicle may accelerate more slowly than expec-ted when the accelerator pedal is depressed.
The ESC system consists of the following sub- functions: • Stability control 3
• Spin control and active yaw control
• Engine drag control
WARNING
• The Electronic Stability Control system ESC is supplementary driver supportintended to facilitate driving and make itsafer – it cannot handle all situations inall traffic, weather and road conditions.
• ESC is not a substitute for the driver'sattention and judgment. The driver isalways responsible for ensuring the vehi-cle is driven in a safe manner, at theappropriate speed, with an appropriatedistance to other vehicles, and in accord-ance with current traffic rules and regula-tions.
Stability control 3This function helps control the driving and brak-ing force of each individual wheel in an attemptto stabilize the vehicle.
Spin control and active yaw controlThis function is active at low speeds and brakesthe wheels that are spinning to transfer additionalpower from wheels that are not spinning. This function also helps prevent the wheels from spinning while the vehicle is accelerating.
Engine drag control
Engine drag control (EDC
4
) helps prevent inad-
vertent wheel lock, e.g. after downshifting orusing engine braking when driving at low speedson a slippery surface. Inadvertent wheel lock while driving could impair the driver's ability to steer the vehicle.
Related information
• Electronic Stability Control Sport mode(p. 265)
• Activating/deactivating Sport mode in Elec-tronic Stability Control (p. 265)
• Electronic Stability Control Sport mode limi-tations (p. 265)
• Electronic Stability Control symbols and mes-sages (p. 266)
1
Roll Stability Control
2 Electronic Stability Control
3 Also called traction control.
4 Engine Drag Control

DRIVER SUPPORT
266
Electronic Stability Control symbolsand messages
A number of symbols and messages related to Electronic Stability Control (ESC) may be dis-played in the instrument panel.
Some examples of symbols and messages are shown in the table below.
SymbolMessageMeaning
Steady glow for approx. 2 seconds. System check when the engine is started.
Flashing light. The ESC is actively operating.
Steady glow. Sport mode is activated.
Note: The ESC system is not deactivated in this mode, but has partially reduced functionality.
ESC Temporarily offThe ESC system's functionality has been temporarily reduced due to high brake system temperatures. The function will be automatically reactivated when the brakes have cooled. See the message in the instrument panel.
ESC Service requiredThe ESC system is not functioning properly.
• Stop the vehicle in a safe place, turn off the engine and then restart it.
• Consult a workshop if the message persists
‒ an authorized Volvo workshop is recommended.
A text message can be erased by briefly pressing the
button in the center of the right-side
steering wheel keypad. If the message persists: Contact a workshop
‒ an
authorized Volvo workshop is recommended.
Related information
• Electronic Stability Control (p. 264)

||
DRIVER SUPPORT
272
WARNING
•The ASL function is supplementary driver support intended to facilitate driving andhelp make it safer – it cannot handle allsituations in all traffic, weather and roadconditions.
• Even if the driver can clearly see thespeed limit sign, the speed informationfrom the Road Sign Information (RSI)function to ASL may be incorrect. In suchcases, the driver must intervene andaccelerate or brake to an appropriatespeed.
• ASL is not a substitute for the driver'sattention and judgment. The driver isalways responsible for ensuring the vehi-cle is driven in a safe manner, at theappropriate speed, with an appropriatedistance to other vehicles, and in accord-ance with current traffic rules and regula-tions.
• See also the heading "Road Sign Infor-mation limitations".
Is SL or ASL active?The symbols in the instrument panel indicatewhich Speed Limiter function is active:
SymbolSLASL
A✓ ✓
Road sign symbol B
after "70" = ASL is
activated.
✓
A WHITE symbol: The function is active. GRAY symbol: Standby mode.
B See "ASL symbol" below for an explanation of the symbol's dif-ferent colors.
ASL symbol
The road sign symbol (next to the stored speed ("70" here) in the centerof the speedometer) can be displayedin three different colors, which are
explained in the following table:
Road signsymbol's colorExplanation
Greenish-yel- low ASL is active
Gray ASL is in standby mode
Amber/orange ASL is temporarily in standby mode, e.g. because a speed limit sign could notbe read.
Related information
•Speed limiter (p. 267)

DRIVER SUPPORT
* Option/accessory.
274
Changing Automatic Speed Limitertolerance The Automatic Speed Limiter (ASL 20
) can be set
to different tolerance levels.
It is also possible to allow the vehicle to drive above or below the posted speed limit. For exam-ple, if the vehicle is following a current postedspeed limit of 70 km/h (43 mph), the driver caninstead allow the vehicle to maintain a speed of75 km/h (47 mph).
Function buttons and symbols 21
.
–Tap the (1) button on the steering
wheel keypad until 70 km/h (43 mph) has been changed to 75 km/h (47 mph) in thecenter of the speedometer (4).
> The vehicle will then use the selected tol- erance of 5 km/h (4 mph) as long as the posted speed limit the vehicle passes is70 km/h (43 mph). This tolerance level will be followed until the vehicle passes a sign with a lower orhigher speed. The vehicle will then adjustto the new speed limit and the set toler-ance will be deleted from the system'smemory. If Road Sign Information * is activated, the
posted speed limit will then be indicated by a RED marking on the speedometer'sspeed scale.
The set tolerance can be adjusted in the sameway as for the Speed Limiter's speed.
NOTE
The highest possible selectable tolerance is +/- 10 km/h (5 mph).
Related information
• Speed limiter (p. 267)
Automatic Speed Limiter limitations
ASL utilizes the speed limit information provided by the RSI 22
system, not from the speed limit
signs that the vehicle passes.
If RSI 22
is unable to interpret and provide ASL
with speed information, ASL will go into standby mode and switch over to SL. The driver will thenhave to actively brake to bring the vehicle downto the appropriate speed. ASL will be reactivated when RSI 22
is once again
able to interpret and provide speed information to ASL. See "Road Sign Information limitations" for more information.
Related information
• Speed limiter (p. 267)
20
Automatic Speed Limiter
21 Note: This illustration is general and details may vary depending on model.
22 Road Sign Information (RSI)

DRIVER SUPPORT
}}
277
Managing Cruise Control speedCruise Control (CC 26
) can be set to various
speeds.
Setting/changing set speed
Note: This illustration is general and details may vary depending on model.
For vehicles with only CC
–Change a set speed by pressing the (1)
or
(3) buttons briefly or by pressing and
holding them:
• Press briefly
: Press briefly: each press
changes the speed in +/- 1 mph (+/- 1 km/h) increments.
• Press
and hold: Release the button when
the set speed indicator (4) has moved tothe desired speed. •
The most recently set speed will be stored.
If speed is increased by depressing the accelera- tor pedal while pressing the
(1) button on
the steering wheel, the vehicle's speed when the button is pressed will be stored as the set speed. Temporarily increasing speed using the accelera- tor pedal, e.g. when passing another vehicle, willnot affect the setting. The vehicle will return tothe set speed when the accelerator pedal isreleased.
For vehicles with both CC and ACC
–Change a set speed by pressing the (1)
or
(3) buttons briefly or by pressing and
holding them:
• Press briefly
: Press briefly: each press
changes the speed in +/- 5 mph (+/- 5 km/h) increments.
• Press
and hold: Release the button when
the set speed indicator (4) has moved tothe desired speed.
• The most recently set speed will be stored.
If speed is increased by depressing the accelera- tor pedal while pressing the
(1) button on
the steering wheel, the vehicle's speed when the button is pressed will be stored as the set speed. Temporarily increasing speed using the accelera- tor pedal, e.g. when passing another vehicle, will not affect the setting. The vehicle will return tothe set speed when the accelerator pedal isreleased.
Using engine braking instead of
applying the brakes
Cruise Control regulates speed by lightly applyingthe brakes. On downgrades, it can sometimes bedesirable to roll a bit faster and let speed bereduced instead by engine braking alone. Thedriver can temporarily disengage the Cruise Con-trol braking function. To disengage CC:
–Press the accelerator pedal about halfway down and then release it.
> Cruise Control will automatically disen- gage the automatic brake function and speed will only be reduced using theengine braking function.
How drive mode affects cruise controlThe way the cruise control maintains the vehicle'sspeed can vary depending on the selected drive mode 27
.
26 Cruise Control
27 For more information, see "Drive modes".