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MAINTENANCE AND SERVICE
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601
Engine compartment overview
This overview shows some service-related components.
Some of the components included in the vehi- cle's electric drive system are located in theengine compartment. Exercise caution whenaccessing the engine compartment and onlytouch what is required for normal mainte-nance.
WARNING
Orange wiring may only be handled by qualified personnel.
WARNING
A number of electrical components in Twin Engine Plug-in Hybrid vehicles use high-voltage current and can be extremely dan-gerous if handled incorrectly.
Do not touch anything that is not clearly described in this Owner's Man-ual.
Be careful when checking/filling fluidsin the engine compartment.
The layout of the engine compartment may vary depending on model and engine variant.
Coolant expansion tank
Brake fluid reservoir (located on the driv- er's side)
Washer fluid filler pipe 12
Fusebox
Air filter
Engine oil filler pipe
WARNING
Bear in mind that the cooling fan (located at the front of the engine compartmentbehind the radiator) may start or continuerunning automatically up to about6 minutes after the engine is turned off. Always entrust engine washing to a work- shop – an authorized Volvo workshop isrecommended. If the engine is hot, there isa risk of fire.
WARNING
The ignition system works with extremely high and dangerous voltages. The vehicleelectrical system should always be in igni-tion mode
0 when work in being per-
formed in the engine compartment. Do not touch any spark plugs or ignition coils when the vehicle electrical system isin ignition mode II or when the engine is
warm.
Related information
Opening and closing the hood (p. 599)
Filling washer fluid (p. 650)
Refilling coolant (p. 604)
Fuses in the engine compartment (p. 615)
12
Fill the washer fluid at regular intervals, e.g. when refueling.
Page 605 of 687

MAINTENANCE AND SERVICE
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603
a warning symbol is displayed in the instru- ment panel when oil pressure is low
. On
engine variants with an oil level sensor, the
warning symbol in the instrument panel
and display messages are used to alert the driver. Some engine variants have both sys-tems. Contact a Volvo retailer for more infor-mation. Change the engine oil and oil filter according to the schedule specified in the Warranty andMaintenance Records Information booklet.Oils of a higher grade than that specified maybe used. If the vehicle is driven in adverse con-ditions, Volvo recommends using an oil with ahigher grade than that specified.
Related information
Checking and filling engine oil (p. 603)
Engine oil specifications (p. 662)
Checking and filling engine oil
The engine oil level is monitored by an elec- tronic oil level sensor.
Filler pipe 1314
It may be necessary to top up engine oil between regularly scheduled services. No action is necessary with regard to engine oil level until a message appears in the instru-ment panel.
WARNING
If this symbol is shown together with the message Engine oil
level Service required, visit a
workshop – an authorized Volvo
workshop is recommended. The oil level may be too high.
CAUTION
If this symbol is shown together with a message about low oil level, for example
Engine oil
level low Refill 1 liter, fill only
with the indicated volume, e.g. 1 liter (1 quart).
WARNING
Do not spill oil on the hot exhaust pipes as this could cause a fire.
Viewing oil level in the center displayThe oil level can be viewed using the elec- tronic oil level gauge in the center display oncethe vehicle has been started. The oil levelshould be checked regularly.
13 Engines with an electronic oil level sensor do not have a dipstick.
14 The layout of the engine compartment may vary depending on model and engine variant.
Page 673 of 687

INDEX
671
Driver Alert Control 346
activating/deactivating 347
limitations 348
rest stop guidance 347
Driver performance 94 settings 95
Driver profile 139 edit 140, 141, 143
select 140
Driver support system 272 Drive mode 305
Drive systems 422 Driving cooling system 450
with a trailer 457
Driving economy 438
Driving through standing water 443 driving with a trailer towball load 660
towing capacity 660
E
Economical driving 438
Electrical outlet 572use 574
Electrical system 607
Electric drive motor specifications 661
electric motor 422 Range 439
Electric parking brake 411
Electronic immobilizer 251
emergency brake lights 164
Emission inspection readiness 590Energy distribution using map data 429
Engine automatic start and stop of combus-
tion engine 423
overheating 450
start 402
turn off 404
Engine braking 407, 418, 436 Engine compartment coolant 604
engine oil 602
overview 601
Engine drag control 273
Engine oil 602 filling 603
filter 602
grade and volume 662
Engine shutdown 404Engine specifications 661 Engine temperature high 450
Environment 30Ethanol content max. 10% by volume 446
Exterior dimensions 657
Extra heater (Auxiliary heater) 233
F
Federal Clean Air Act 590
Ferry transport 430
Flooded road 443
Fluids, volumes 650, 664
Fluids and oils 663, 664 Fog lights rear 163
Four-C 430 Front seat blower 222
climate 215
heating 216, 217
temperature 223
ventilation 217
Front seat manual 188