2018 Hyundai Sonata The following items

F9
Introduction
For customers who do not use TOP
Tier Detergent Gasoline regularly,
and have problems starting or the
engine does not run smoothly, addi-
tives that you can buy separately
may be added to the gasoline. If TOP
TIER Detergent Gasoline is not avail-
able, one bottle of additive added to
the fuel tank at every 7,500 miles or
12 months is recommended.
Additives are available from your
authorized HYUNDAI dealer along
with information on how to use them.
Do not mix other additives.
Operation in foreign countries
If you are going to drive your vehicle
in another country, be sure to:
Observe all regulations regarding registration and insurance.
Determine that acceptable fuel is available. No special break-in period is needed.
By following a few simple precautions
for the first 600 miles (1,000 km) you
may add to the performance, econo-
my and life of your vehicle.
Do not race the engine.
While driving, keep your engine
speed (rpm, or revolutions per
minute) between 2,000 rpm and
4,000 rpm.
Do not maintain a single speed for long periods of time, either fast or
slow. Varying engine speed is need-
ed to properly break-in the engine.
Avoid hard stops, except in emer- gencies, to allow the brakes to seat
properly.
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CALIFORNIA PROPOSITION 65
WARNING
Items contained in motor vehi-
cles or emitted from them are
known to the State of California
to cause cancer and birth
defects or reproductive harm.
These include:
Gasoline and its vapors
Engine exhaust
Used engine oil
Interior passenger compart-
ment components and materi-
als
Component parts which are
subject to heat and wear
In addition, battery posts, termi-
nals and related accessories
contain lead, lead compounds
and other chemicals known to
the State of California to cause
cancer and reproductive harm.
WARNING

2-41
Safety system of your vehicle
2
Securing a child restraint seatwith "Tether Anchor" system
First secure the child restraint with
the LATCH lower anchors or the seat
belt. If the child restraint manufactur-
er recommends that the top tether
strap be attached, attach and tighten
the top tether strap to the top tether
strap anchor.
Child restraint hook holders are
located on the package tray. To install the tether anchor:
1. Route the child restraint tether strap
over the child restraint seatback.
Route the tether strap under the
head restraint and between the
head restraint posts, or route the
tether strap over the top of the vehi-
cle seatback. Make sure the strap is
not twisted.
2. Connect the tether strap hook to the tether anchor, then tighten the teth-
er strap according to the child seat
manufacturer's instructions to firmly
secure the child restraint to the seat.
3. Check that the child restraint is securely attached to the seat by
pushing and pulling the seat forward
and from side-to-side.
Take the following precautions
when installing the tether strap:
Read and follow all installation
instructions provided with
your child restraint system.
NEVER attach more than one
child restraint to a single teth-
er anchor. This could cause
the anchor or attachment to
come loose or break.
Do not attach the tether strap
to anything other than the cor-
rect tether anchor. It may not
work properly if attached to
something else.
Do not use the tether anchors
for adult seat belts or harness-
es, or for attaching other items
or equipment to the vehicle.
WARNING
OLF034035
OLF034034

3-75
Convenient features of your vehicle
3
Warning Message Mode
If one of followings occurs, warning
messages will be displayed on the
information mode for several sec-
onds.
- Malfunction of below systems

(TPMS)
system (AEB)

User settings mode
In this mode, you can change the
setting of the instrument cluster,
doors, lamps, etc.
1. Driving Assist
2. Door
3. Lights
4. Sound
5. Convenience
6. Service interval
7. Other features
8. Reset
The information provided differs
according to the items applied to
your vehicle. 1. Driving Assist
LKAS (Lane Keeping Assist
System)
- Lane Departure Warning/Standard LKA/Active LKA
To adjust the sensitivity of the Lane
Keeping Assist System.
For more information, refer to the
"Lane Keeping Assist System" in
chapter 5.
DAA (Driver Attention Alert)
To adjust the sensitivity of the Driver
Attention Alert (DAA).
- Off/Normal/Early
For more information, refer to the
"Driver Attention Alert (DAA)" in
chapter 5.

7-6
Maintenance
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You should exercise the utmost care
to prevent damage to your vehicle
and injury to yourself whenever per-
forming any maintenance or inspec-
tion procedures.
We recommend you have your vehi-
cle maintained and repaired by an
authorized HYUNDAI dealer. An
authorized HYUNDAI dealer meets
HYUNDAI's high service quality
standards and receives technical
support from HYUNDAI in order to
provide you with a high level of serv-
ice satisfaction.
Owner’s Responsibility
Maintenance service and record reten-
tion are the owner’s responsibility.
You should retain documents that
show proper maintenance has been
performed on your vehicle in accor-
dance with the scheduled mainte-
nance service charts shown on the
following pages. You need this infor-
mation to establish your compliance
with the servicing and maintenance
requirements of your vehicle war-
ranties. Detailed warranty information is pro-
vided in your Owner's Handbook &
Warranty Information booklet.
Repairs and adjustments required as
a result of improper maintenance or
a lack of required maintenance are
not covered.
Owner Mainte
nance
Precautions
Inadequate, incomplete or insuffi-
cient servicing may result in opera-
tional problems with your vehicle that
could lead to vehicle damage, an
accident, or personal injury. This
chapter provides instructions only for
the maintenance items that are easy
to perform. Several procedures can
be done only by an authorized
HYUNDAI dealer with special tools.
Your vehicle should not be modified
in any way. Such modifications may
adversely affect the performance,
safety or durability of your vehicle
and may, in addition, violate condi-
tions of the limited warranties cover-
ing the vehicle.
Certain modifications may also be in
violation of regulations established by
the U.S. Department of Transportation
and other federal or state agencies. Improper owner maintenance dur-
ing the warranty period may affect
warranty coverage. For details,
read the separate Owner's
Handbook & Warranty Information
booklet provided with the vehicle.
If you're unsure about any service
or maintenance procedure, have it
done by an authorized HYUNDAI
dealer.
NOTICE

7
Maintenance
7-13
Maintenance Under Severe Usage Conditions (Gamma 1.6 T-GDI/Theta 2.0 T-GDI)
The following items must be serviced more frequently on cars normally used under severe driving conditions. Refer
to the chart below for the appropriate maintenance intervals.
R : Replace I : Inspect and, after inspection, clean, adjust, repair or replace if neces\
sary
MAINTENANCE ITEMMAINTENANCE OPERATIONMAINTENANCE INTERVALSDRIVING
CONDITION
Engine oil and filterREvery 3,000 miles or 6 monthsA, B, C, D, E, F, G, H, I, J, K
Air cleaner filterRMore frequentlyC, E
Spark plugsRMore frequentlyA, B, H, I, K
Automatic transmission fluid
(if equipped)REvery 60,000 milesA, C, E, F, G, I
Ecoshift dual clutch transmission fluid
(if equipped)REvery 72,000 milesC, D, E, F, G, H, I, J
Front brake disc/pads, calipersIMore frequentlyC, D, G, H
Rear brake shoes or disc/padsIMore frequentlyC, D, G, F

Maintenance
7-18
Maintenance Under Severe Usage Conditions (Theta 2.4 GDI)
The following items must be serviced more frequently on cars normally used under severe driving conditions. Refer
to the chart below for the appropriate maintenance intervals.
R : Replace I : Inspect and, after inspection, clean, adjust, repair or replace if neces\
sary
MAINTENANCE ITEMMAINTENANCEOPERATIONMAINTENANCE INTERVALSDRIVING
CONDITION
Engine oil and filterREvery 3,750 miles or 6 monthsA, B, C, D, E, F, G, H, I, J, K
Air cleaner filterRMore frequentlyC, E
Spark plugsRMore frequentlyA, B, H, I, K
Automatic transmission fluid
(if equipped)REvery 60,000 milesA, C, E, F, G, I
Front brake disc/pads, calipersIMore frequentlyC, D, G, H
Rear brake shoes or disc/padsIMore frequentlyC, D, G, F