2018 VOLVO S90 climate control

STARTING AND DRIVING
* Option/accessory.
418
Start/Stop function
Start/Stop is a function that temporarily switches off the engine when the vehicle has stopped,e.g. at a traffic light or in heavy traffic, and thenstarts it again automatically when the brakepedal is released.
The Start/Stop function reduces fuel consump- tion, which helps to reduce exhaust emissions. The system makes it possible to drive more eco- nomically and climate-smart by letting the engineauto-stop when appropriate.
Related information
• Driving with the Start/Stop function (p. 418)
• Conditions for the Start/Stop function(p. 420)
• Drive modes
* (p. 413)
Driving with the Start/Stop function
Start/Stop is a function that temporarily turns off the engine when the vehicle is stationary andthen automatically starts it again when the vehi-cle starts moving.
The Start/Stop function is available when the engine is started and can be activated if certainconditions are met. The instrument panel indi-cates if the function is available, active or notavailable. All of the vehicle's ordinary systems, such as lighting, radio, etc. function normally when theengine has been auto-stopped. Certain functionsmay be temporarily reduced, however, such asthe climate system's blower speed or extremelyhigh audio system volume.
Auto-stopTo auto-stop the engine:
• Stop the vehicle by applying the brakes andkeep the brake pedal depressed. The enginewill auto-stop.
In Eco or Comfort 5
drive mode, the engine may
auto-stop before the vehicle has completely stop-ped. With Adaptive Cruise Control or Pilot Assist acti- vated, the engine will auto-stop after approxi-mately three seconds.
Auto-startThe following conditions must be met for theengine to auto-start. • Release the brake pedal. The engine will auto-start and the vehicle can be driven. Onan uphill gradient, Hill Start Assist (HSA) willactivate to help prevent the vehicle from roll-ing backward.
• When Auto-hold is activated, auto-start willbe delayed until the accelerator is pressed.
• When Adaptive Cruise Control or Pilot Assistare activated, the engine will auto-start whenthe accelerator pedal is depressed or the
button on the left-side steering wheel
keypad is pressed.
• Maintain pressure on the brake pedal and press the accelerator pedal. The engine willauto-start.
• On a downhill gradient: Release the brakepedal slightly so that the vehicle begins toroll. The engine will auto-start after a slightincrease in speed.
5
Normal start mode.

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STARTING AND DRIVING
430
NOTE
When switching to higher octane fuel or changing gasoline brands, it may be neces-sary to fill the tank more than once before adifference in engine operation is noticeable.
Fuel FormulationsDo not use gasoline that contains lead or manga- nese as a knock inhibitor, and do not use leadadditives. Besides damaging the exhaust emis-sion control systems on your vehicle, lead hasbeen strongly linked to certain forms of cancer. Many fuels contain benzene as a solvent. Unburned benzene has been strongly linked tocertain forms of cancer. If you live in an areawhere you must fill your own gas tank, take pre-cautions. These may include: •standing upwind away from the filler nozzle while refueling
• refueling only at gas stations with vaporrecovery systems that fully seal the mouth ofthe filler neck during refueling
• wearing neoprene gloves while handling afuel filler nozzle.
Use of AdditivesWith the exception of gas line antifreeze duringwinter months, do not add solvents, thickeners, or other store-bought additives to your vehicle'sfuel, cooling, or lubricating systems. Overuse maydamage your engine, and some of these additivescontain organically volatile chemicals. Do notneedlessly expose yourself to these chemicals.
WARNING
Never carry a cell phone that is
switched on
while refueling your vehicle. If the phone rings, this may cause a spark that could ignite gaso-line fumes, resulting in fire and injury.
WARNING
Carbon monoxide is a poisonous, colorless, and odorless gas. It is present in all exhaustgases. If you ever smell exhaust fumes insidethe vehicle, make sure the passenger com-partment is ventilated, and immediately returnthe vehicle to a trained and qualified Volvoservice technician for correction.
Demanding drivingIn demanding driving conditions, e.g. when driving in a hot climates, driving with a trailer or drivingfor longer periods at higher altitudes (mountainlandscapes) than normal, it is recommended switching to a higher octane fuel than AKI 91 7
or
changing gasoline brand to take full advantage of your car's engine capacity and obtain the opti-mum driving force.
Related information
• Fuel (p. 428)
• Emission controls (p. 431)
7
AKI (Anti Knock Index) is an average value of RON (Research Octane Number) and MON (Motor Octane Number) - (RON)+(MON)/2

WHEELS AND TIRES
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509
imprinted on the sidewall of the tire. The last four digits in the series is the Department ofTransportation (DOT) stamp and indicates theweek and year the tire was manufactured. Thetire in the illustration has 0717 as the last fourdigits, which means it was manufactured week 7of 2017.
Tire ageTires degrade over time, even when they are notbeing used. It is recommended that tires gener-ally be replaced after 6 years of normal service.Heat caused by hot climates, frequent high load-ing conditions or Ultra Violet (U.V.) exposure canaccelerate the aging process. The temporary spare
2
should also be replaced at 6-year inter-
vals, even if it has never been used. A tire with e.g., visible cracks or discoloration should bereplaced immediately.
Tire economy
• Maintain correct tire pressure.
• Avoid fast starts, hard braking and tirescreeching.
• Tire wear increases with speed.
• Correct front wheel alignment is very impor-tant.
• Unbalanced wheels impair tire economy anddriving comfort. •
Tires must maintain the same direction ofrotation throughout their lifetime.
• When replacing tires, the tires with the mosttread should be mounted on the rear wheelsto reduce the chance of oversteer duringhard braking.
• Hitting curbs or potholes can damage thetires and/or wheels permanently.
Tire rotationYour vehicle has no required tire rotation. Drivingstyle, tire pressure, climate and road conditionsaffect how quickly the tires age and exhibit signsof wear. Maintaining the correct tire pressurehelps keep tread wear evenly distributed. To help prevent differences in tread depth and wear patterns forming on the tires, the front andrear wheels should be rotated, i.e. the front tiresmoved to the rear and the rear tires moved to thefront. Ideally, tire rotation should be done the firsttime after approximately 5000 km (ca3100 miles) and thereafter at 10,000 km(approx. 6200 miles) intervals. If you have any questions regarding tread depth, Volvo recommends consulting an authorizedVolvo workshop. If significant differences in wear(> 1 mm difference in tread depth) between thetires have already occurred, the least worn tiresshould always be mounted on the rear wheels. Afront-wheel skid (understeer) is usually easier to control than a rear-wheel skid (oversteer). If thefront wheels skid, the vehicle will continue in astraight line instead of the rear wheels skiddingto the side, which could cause you to completelylose control of the vehicle. It is therefore impor-tant that the rear wheels never lose grip beforethe front wheels.
Storing wheels and tiresWhen storing complete wheels (tires mounted onrims), they should be suspended off the floor orplaced on their sides on the floor. Tires not mounted on rims should be stored on their sides or standing upright, but should not besuspended.
CAUTION
Tires should preferably be stored in a cool, dry, dark place, and should never be stored inclose proximity to solvents, gasoline, oils, etc.
2
Not available on all models.

WHEELS AND TIRES
514
Uniform Tire Quality Grading
ALL PASSENGER VEHICLE TIRES MUST CONFORM TO FEDERAL SAFETY REQUIRE-MENTS IN ADDITION TO THESE GRADES .
Quality grades can be found, where applica- ble, on the tire sidewall between the treadshoulder and maximum section width. Forexample: Treadwear 200 Traction AA Temperature A
TREADWEARThe treadwear grade is a comparative rating based on the wear rate of the tire when testedunder controlled conditions on a specified gov-ernment test course. For example, a tire graded150 would wear one and one half (1 ½) times aswell on the government course as a tire graded100. The relative performance of tires dependsupon the actual conditions of their use, however,and many depart significantly from the norm dueto variation in driving habits, maintenance practi-ces and differences in road characteristics andclimate.
TRACTIONThe traction grades, from highest to lowest, areAA, A, B, and C, as measured under controlledconditions on specified government test surfacesof asphalt and concrete. A tire marked C mayhave poor traction performance.
WARNING
The traction grade assigned to this tire is based on braking (straight-ahead) tractiontests and is not a measure of cornering (turn-ing) traction.
TEMPERATUREThe temperature grades are A (the highest), B, and C, representing the tire's resistance to thegeneration of heat and its ability to dissipate heatwhen tested under controlled conditions on aspecified indoor laboratory test wheel. Sustainedhigh temperature can cause the material of thetire to degenerate and reduce tire life, and exces-sive temperature can lead to sudden tire failure.The grade C corresponds to a minimum level ofperformance that all passenger vehicle tires mustmeet under the Federal Motor Safety StandardNo. 109. Grades B and A represent higher levelsof performance on the laboratory test wheel thanthe minimum required by law.
WARNING
The temperature grade for this tire is estab- lished for a tire that is properly inflated andnot overloaded. Excessive speed, under-infla-tion, or excessive loading, either separately orin combination, can cause heat buildup andtire failure.
Related information
•Tires (p. 508)
• Tire sidewall designations (p. 512)

LOADING, STORAGE AND PASSENGER COMPARTMENT
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* Option/accessory.539
Tunnel console The tunnel console is located between the front seats.
Storage compartment with cover *. The cover
can be opened/closed by pressing the han- dle.
Storage compartment with a 12 V outlet and cup holders for the driver and passenger.
Storage compartment and USB port under the armrest.
Climate control panel for the rear seats * or
storage compartment.
Electrical outlets and USB ports. The USB ports can be used to charge e.g. a cellular phone or tablet 1
. The cover can be opened/
closed by pressing the handle.
WARNING
Store loose objects, such as cell phone, cam- era, remote control for extra equipment, etc.,in the glove compartment or another compart-ment. Otherwise, these could injure people inthe vehicle in the event of hard braking or acollision.
NOTE
One of the sensors for the alarm * is located
under the cup holder in the center console. Avoid placing coins, keys and other metalobjects in the cup holder as this could triggerthe alarm.
CAUTION
Keep in mind that glossy surfaces can be easily scratched by e.g. metal objects. Do notplace keys, phones or similar items on sensi-tive surfaces.
Related information
• Passenger compartment interior (p. 538)
• Electrical outlets (p. 539)
• Climate system controls (p. 208)
Electrical outlets
There are two 12-volt electrical sockets and one 12-volt electrical socket * in the trunk.
If a problem occurs with an electrical socket, contact a workshop - an authorized Volvo work-shop is recommended.
12 V outlets
12 V outlet in the tunnel console, front seat.
The 12 V outlets can be used for devices intended for this such as MP3 players, coolersand cellular phones.
1 Media cannot be played through the audio system's speakers using the USB sockets.

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MAINTENANCE AND SERVICE
550
Related information
•Vehicle status (p. 552)
• Scheduling service and repairs (p. 552)
• Connecting equipment to the vehicle's data link connector (p. 36)
• Technician certification (p. 37)
• Climate control system service (p. 558)
• Maintenance of the brake system (p. 401)
• Engine compartment overview (p. 559)
Data transfer between vehicle andworkshop over Wi-Fi
Volvo workshops have a designated Wi-Fi net- work for secure data transfer between your vehi-cle and the workshop. Your visit to the workshopwill be easier and more effective when diagnos-tics information and software can be transferredover the workshop's network.
When you arrive at the workshop, your technician can connect your vehicle to the workshop's Wi-Finetwork to perform troubleshooting and down-load software. For this type of communication,the vehicle only connects to the workshop's net-work. The vehicle can only be connected to thedesignated workshop networks, not to any othernetwork, e.g. your home network.
Manual connection to workshop Wi-FiManual connection is usually performed by aservice technician. Because the technician usesthe buttons on your remote key to connect thevehicle, it is important that you bring a key withbuttons when taking the vehicle in to a workshop.Pressing the lock button on the remote key threetimes will connect the vehicle to the workshop'sWi-Fi network. When the car is connected to a Wi-Fi network, the
symbol appears in the center display.
WARNING
The vehicle may not be driven when it is con- nected to the workshop's networks and sys-tems.
Related information
• Handling system updates via Download Cen- ter (p. 551)
• Scheduling service and repairs (p. 552)

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MAINTENANCE AND SERVICE
* Option/accessory.
558
Hood completely closed. The illustration is generic - details may vary according to vehicle model.
WARNING
Never drive with the hood open! If there are any indications while driving that the hood is not completely closed, stop imme-diately and close it securely.
Related information
• Engine compartment overview (p. 559)
• Door and seat belt reminders (p. 51)
Climate control system service Service and repairs on the air conditioning sys- tem should only be done by an authorized work-shop.
Troubleshooting and repairsThe air conditioning system contains a fluores- cent tracer substance. Ultraviolet light is used tosearch for leaks in the system. Volvo recommends contacting an authorized Volvo workshop.
Vehicles with R134a refrigerant
WARNING
The air conditioning system contains the refrigerant R134a under pressure. Serviceand repairs to the system should only be doneby an authorized workshop.
Related information
•Volvo's service program (p. 548)
Replacing a windshield with head-
up display
*
Vehicles with a head-up display have a special type of windshield that meets the requirementsfor displaying projected information.
Volvo recommends contacting an authorized Volvo workshop for assistance replacing thewindshield. The correct type of replacementwindshield must be used in order for the head-updisplay to function properly.
Related information
• Head-up display
* (p. 140)
• Cleaning the head-up display
* (p. 591)

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MAINTENANCE AND SERVICE
574
CAUTION
Only a modern battery charger with controlled charge voltage should be used to charge thestarter battery and support battery. The rapidcharging function should not be used as thiscould damage the battery.
CAUTION
Failure to observe the following could cause the infotainment energy save mode to tempo-rarily stop working and/or a message in thedriver's display regarding the state of chargeof the starter battery may be temporarilyincorrect after an external starter battery orbattery charger has been connected:
• The negative battery terminal of the vehi- cle's starter battery must
never be used
to connect an external starter battery orbattery charger – only the vehicle's neg-
ative charging point should be used as
a grounding point.
NOTE
If the starter battery becomes discharged too many times, it will shorten its service life. The service life of the starter battery is affec- ted by several factors, such as driving condi-tions and climate. The starting capacity of thebattery reduces gradually over time. The bat-tery must therefore be recharged if the vehi-cle is not used or a long period of time or if itis only driven short distances. Severe cold fur-ther limits the starting capacity. To keep the starter battery in a good condi- tion, the vehicle should be driven at least15 minutes per week or the battery should beconnected to a battery charger with automatictrickle charging. A starter battery that is always kept fully charged has the maximum service life.
Location
The start battery is located in the trunk.
WARNING
If the starter battery is disconnected, the func- tion for automatic opening and closing mustbe reset to function correctly. A reset isrequired in order for the pinch protection towork.
CAUTION
On certain models, the battery is secured with a tensioning strap. Make sure that the ten-sioning strap is always securely tightened.