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4. CARE AND MAINTENANCE

Care for the harness buckle 

It is vital for the safety of your child that the harness buckle works correctly. Malfunctions 

of the harness buckle are usually caused by accumulations of dirt or foreign bodies. 

Malfunctions are as follows:

• The buckle latches are ejected only slowly when the red release button is pressed.

• The buckle latches will no longer lock home (i.e. they are ejected again if you  try to 

push them in).

• The buckle latches engage without an audible „click“.

• The buckle latches are difficult to insert (you feel resistance).

• The buckle only opens if extreme force is applied.

Remedy

 

wash out the harness buckle so that it functions properly once again:

Cleaning the harness buckle

1. 

Open the harness buckle 

21

 (press the red button).

2. 

Open the Velcro fastener on the crotch pad 

32

 and take off the crotch pad from the 

cover.

3. 

Put the seat shell into the recline position 

4. 

Grasp the metal plate 

33

 from underneath and turn it into a vertical position

5. 

Slide the metal plate 

33

 through the slot 

34

 

6. 

Remove the harness buckle 

21

 

7. 

Soak the harness buckle 

21

 in warm water with washing-up liquid for at least an hour. 

Then rinse and dry it thoroughly.

Cleaning

 CAUTION 

Please be sure to use only genuine Britax replacement seat covers, as 

the seat cover is an integral part of the child safety seat which plays an important role 

in ensuring that the system works properly. Replacement seat covers are available from 

your retailer.

 

CAUTION! 

The child seat must not be used without its cover.

•  The cover can be removed and washed with a mild detergent using the  

 

washing machine‘s cycle for delicate items (30 °C). Please observe the    

instructions on the washing label of the cover.

•  The plastic parts can be cleaned using soapy water. Do not use harsh   

cleaning agents (such as solvents).

•  The harnesses can be washed in lukewarm soapy water.

 

CAUTION!

 

Never remove the buckle latches 

20

 from the straps.

•  The shoulder pads can be washed in lukewarm soapy water.

Removing the cover

A) Headrest

1. 

Move the headrest of the child seat to the upper position.

2. 

Take the elastic seam of the cover 

35

 from the hooks at the back side of the headrest 

and remove the cover of the headrest.

B) Cover 

1. 

Undo the hooks on the bottom side.

2. 

Undo the hooks located on the upper back side. 

3. 

Undo the elastic loop on both sides of the belt guides.

4. 

Open the two plastic fasteners on the back side of the cover.

5. 

Remove the cover.

Re-fitting the Cover:

Simply follow the steps in the opposite order.

 CAUTION! 

Never use the child seat in installation method 

A

 without a correct instal-

led buckle. Make sure that the metal plate 

33

 is correctly attached.

 CAUTION! 

Check that the harness straps are not twisted and that they  

 

have  been correctly inserted in the belt slots on the cover.

33

34

21

32

35

2. USE IN THE VEHICLE  

Please observe the instructions on the use of child restraint systems described in 
your vehicle owner’s manual. 
The seat may be used in vehicles equipped with ISOFIX ,Top Tether anchoring 
systems and 3-point belt (see type list). Please consult your vehicle owner’s 
manual for information about the ISOFIX &Top Tether anchoring points and the 
installation with 3-point belt. Also check your vehicle owner’s manual for seats 
which are approved for child safety seats in the weight classes 9-18 kg, 15-25 kg, 
22-36 kg. 
You can use your child car seat as follows:

In the direction of travel

Yes

Against the direction of travel

No 

1)

with 2-point belt (Vehicle belt)

NO

On seats featuring:
ISOFIX attachments (between seat surface and back-

rest), Top Tether anchoring points (for example on the 

parcel shelf, on the floor or behind the backrest) and 

3-point belt (Vehicle belt)  

Yes 

2) 3)

(Please observe the applicable regulations in your country)

1) Use is permitted on a rearward-facing vehicle seat (e.g. in a van or minibus) only if 

the vehicle seat is also approved for use by adults. The seat must not be positioned 

anywhere where it is in range of an airbag which is being deployed.
2) The safety belt must be approved to ECE R 16 or a comparable standard (see test 

label on belt with an “E” or “e” in a circle).
3) If there is a front airbag: Slide the passenger seat a long way back and refer to any 

instructions in vehicle owner’s manual.

1. GENERAL SAFETY NOTES

  

 

 

Take the time to carefully read through these instructions, and always 

keep them ready to hand in the designated pocket on the child seat.

 For the protection of all vehicle occupants

In the case of an emergency stop or an accident, persons or objects which are 

not properly secured in the car can cause injury to other vehicle occupants. 

For this reason, please always check that:

• the backrests of the vehicle seats are locked (e.g. that the latch on a folding   

 rear seat bench is engaged).

• all heavy or sharp-edged objects in the vehicle (e.g. on the parcel shelf) are  

 secured. 

• all persons in the vehicle have their seat belts fastened.

• the child safety seat is always secured in the car via the ISOFIX anchoring, 

the Top Tether and the 3-point belt (Vehicle belt) or the ISOFIX anchoring and 
the Top Tether, even when there is no child in the seat

.

 For the protection of your child 

• The more snugly the harness fits over your child‘s body, the safer your child  

   will be.

• Please do not ever leave your child unattended in the child safety seat in the     

   vehicle.

• Use on the rear seat:

   Move the front seat forward far enough that you child‘s feet cannot hit the 

   backrest of the front seat (to prevent risk of injury).

• The child safety seat can get hot in direct sunshine. 

Caution: 

Children‘s    

   skin is delicate and could be injured as a result. Protect the child seat against  

   intensive direct sunlight when it is not currently in use.

• Only allow your child to enter and exit the vehicle on the pavement side.

• Make stops during longer journeys to give your child an opportunity to run  

   about and play.

 

 To protect your vehicle

Some vehicle seat coverings made of more delicate materials (e.g. velour, 

leather, etc.) may develop wear marks when child seats are used. For optimum 

protection of your seat covers, we recommend using the BRITAX Car Seat 

Protector, which is available from our range of accessories.

3. APPROVAL  

BRITAX

child safety seat

Tested and certified accord-

ing to  ECE* R 44/04

Group

Body weight  

ADVANSAFIX

1

9 to 18 kg

2

15 to 25 kg

3

22 to 36 kg

The child safety seat has been designed, tested and certified according to the require-

ments of the European Standard for Child Safety Equipment (ECE R 44/04). The test 

mark E (in a circle) and the certification number are located on the orange certification 

sticker (sticker on the child safety seat).

• This certification will be invalidated if you make any modifications to the child safety  

   seat.

• The ADVANSAFIX child safety seat must only be used to secure your child in the  

   vehicle. It must never be used as a seat or toy in the home.

Risk of injury due to unauthorised modifications!

Unauthorised technical modifications may reduce or entirely void the seat’s protective 

properties.

•  Do not make any technical modifications to the child seat.

•  Use the child seat only as described in these user instructions.

The ADVANSAFIX offers a variety of mounting options, the following table indicates the 

types of installation for the respective groups:

Group 

Installation method

Child installation

User Guide 

chapter

1 (9-18 kg)

TopTether

 

Vehicle belt

 

with 5-point harness

A

2 (15-25 kg)

TopTether

 

Vehicle belt

with 5-point harness

A

2 (15-25 kg)

TopTether

 

Vehicle belt

B

3 (22-36 kg)

TopTether

 

Vehicle belt

B

1. 

Squeeze the adjustment handle 

12

 at the rear of the headrest 

07

 and push the 

headrest into the lowest position.

2. 

Release the adjustment handle 

12

 to lock into place.

3. 

Lift the lower part of the headrest cover and place it over the headrest

4. 

Open the left and right buttons on the lower part of the cover 

43

 and lay the cover 

piece on the seating area. 

5. 

Take the shoulder belts 

08

 and the buckle latches 

20

 from the storage compart-

ment 

47

 and unroll the shoulder belts. 

6. 

Fold back the two cover pieces and close the left and right poppers 

42

 on the 

lower part of the cover.  

Should the child seat not be in the most reclined position:

Press the recline handle so that the seat is in its most upright position.

7. 

  Lift the harness buckle 

21

 and the shoulder pads 

19

 from the storage bag 

14

 on 

the back side of the seat.  

8. 

  Refitting harness buckle 

21

 and crotch pad 

32

: pull the elastic strip 

44

 in the sea-

ting area towards you. Group 1 (9-18 kg) use the belt slot closest to the backrest 

a

 

for Group 2 (15-25 kg) use the one furthest away 

b

9. 

  Take the harness buckle 

21

 and hold the metal plate 

33

 verticaly. Push it with the 

narrow side upwards through the belt slot 

  a  or  b

 into the seat shell from above.

10. 

Ensure by looking underneath the seat that the metal plate 

33

 is in a horizontal posi-

tion and check the installation by pulling on the harness buckle 

21

 several times.

11. 

Guide the two buckle latches 

20

 together and engage them before putting them 

into the harness buckle 

21

 - this should make a click noise. 

 CAUTION!

 The lap belts must not be twisted or swapped. 

12. 

Thread the shoulder pads 

19

 onto the shoulder belts 

08

 in the correct orientation 

as shown ensuring there are no twists. Allign the two loops of the shoulder belts 

08

 

and strap loops of the shoulder pads  

19

.

13. 

Pull the shoulder belts 

08

 and the strap loops of the shoulder pads 

19

 through the 

slots 

40

Tip: Fold up the rear cover part. 

14. 

Pull the strap loops of the shoulder pads 

19

 onto the plastic extensions 

41

 of the 

shoulder belt height adjuster 

10

 .Tip: the strap loops of the shoulder pads should 

be the lower loop.

15. 

Fold the upper part of the cover downwards.

 CAUTION! 

The shoulder belts 

08

 must not be twisted or swapped. 

16. 

Take the connecting piece 

39

 from the provided storage on the back side of the 

child seat.

17. 

Hook the shoulder belts 

08

 back onto the connecting piece 

39

. The left loop on 

the left arm of the connecting piece and the right loop on the right arm. 

18. 

Pull slowly on the adjustment strap 

09

 and at the same time push the connecting 

piece 

39

 between backrest and the provided storage of the connecting piece.

1. 

Put the storage bag 

14

 forward over the seat.

2. 

Loosen the 5-point harness 

38

 of the child seat as much as possible.

Back side of the child seat:

3. 

Press the button of the shoulder belt height adjuster 

10

 at the rear of the seat shell 

and tilt the shoulder belt height adjuster 

10

 towards you.

4. 

 Move the shoulder belt height adjuster 

10

 into the top position and fix the position 

by releasing the button of the shoulder belt height adjuster.

5. 

Loosen the 5-point harness 

38

 of the child seat as much as possible. Unhook the 

shoulder belts 

08

 on the back side of the child seat from the connecting piece 

39

 .

6. 

Snap the connecting piece 

39

 in the provided storage.

7. 

  Pull below both, the shoulder pads 

19

 and the two shoulder belts 

08

 to the front 

through the slots 

40

 (front side of the child seat).

8. 

  Slide the belt loops off of the plastic extensions 

41

 of the shoulder belt height adjus-

ter 

10

Front side of the child seat:

9. 

   Pull out the adjuster strap 

09

 as far as possible.

10. 

Store the adjuster strap in the adjuster housing 

26

.

11. 

Pull the shoulder pads 

19

 through the slots 

40

 to the front.

12. 

Remove the shoulder pads 

19

 from the shoulder belts 

08

 and put them in the 

storage bag on the rear of the seat. 

13. 

Open the harness buckle 

21

 (press the red release button)  

14. 

Lift the lower part of the rear cover to the top and place it over the headrest.

15. 

Open the left and right poppers 

42

 on the lower part of the cover 

43

 and lift the 

cover piece to the front. Slide the buckle latches 

20

 down into the storage compart-

ments.

16. 

Roll the shoulder belts 

08

 together and place them also into the storage compart-

ments.

17. 

Repositon the two cover parts to the rear and lock the poppers 

42

 on the left and 

right side of the cover back side.

18. 

Lift the recline handle and pull at the front to fully recline the child seat.

19. 

Pull the elastic strip 

44

 over the harness buckle 

21

.

20. 

Grasp the metal plate 

33

 from underneath and turn it into a vertical position.

21. 

Push upwards and slide the metal plate 

33

 through the slot 

34

.

22. 

Remove the harness buckle 

21

 with the crotch pad 

32

 and store it in the storage 

bag 

14

.

9. REMOVING THE 5-POINT HARNESS

 

10. REFITTING THE 5-POINT HARNESS

 

38

10

39

08

39

19

08

40

41

10

26

09

40

19

08

21

42

43

08

42

12

07

42

43

33

34

44

21

32

21

14

20

08

47

42

32

21

14

44

21

32

20

21

19
08

08

40

19

19

41

10

39

39

09

08

BRITAX RÖMER 

 

Kindersicherheit GmbH

Blaubeurer Straße 71

D-89077 Ulm

Germany

t: +49 (0) 731 9345-199/-299   

f: +49 (0) 731 9345-210 

e: [email protected] 

www.britax.de

BRITAX EXCELSIOR LIMITED

 

1 Churchill Way West 

Andover 

Hampshire SP10 3UW 

United Kingdom 

 

t: +44 (0) 1264 333343   

f: +44 (0) 1264 334146 

e: [email protected] 

www.britax.eu

20

a

b

21

33

9  –  36 kg 
9 m ~ 12 y

www.britax.eu

EDV

-NR.: 2000012068   14/08

GB

User instructions 

ADVANSAFIX

140826_ADVANSAFIX_EN_WIP_gb-GB.indd   2

26.08.2014   14:59:58

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