Atego Online Operating Instruction [In depth | Practical advice

Electrical system

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Partially masking headlamps – driving on the left/right

Notes on changing bulbs

Bulbs and lights are essential for vehicle safety. You must therefore ensure that all bulbs are functioning at all times.

Bulbs have a limited service life.

Mercedes-Benz recommends, that when a dipped-beam headlamp or main-beam headlamp bulb fails that the corresponding bulb in the other headlamp is replaced at the same time. Mercedes-Benz recommends that you use Mercedes-Benz longlife bulbs for this purpose.

Risk of injury

Observe the following notes concerning the handling of bulbs:

Bulbs can become very hot. There is a risk of burns. You must therefore allow them to cool completely before changing them.
To avoid injuries, always wear non-slip gloves and safety goggles when replacing bulbs.
Do not use a bulb if it has been dropped or if its glass has been scratched. The bulb could explode. You could be injured by the shards of glass from a broken bulb.
Keep bulbs out of reach of children.
Only fit bulbs in enclosed lamps which have been designed for them and only use replacement bulbs of the same type and with the appropriate voltage.
Dirt on the glass bulb reduces the operating life of the bulb. Do not hold the glass bulb with your bare hands. If necessary, clean the glass bulb with alcohol or spirit while it is cold and wipe with a lint-free cloth.
Protect bulbs from moisture when in use and do not allow them to come into contact with liquids.
Where possible, only have defective bulbs changed at a qualified specialist workshop which has the necessary specialist knowledge and tools for the work required. Mercedes-Benz recommends that you use a Mercedes-Benz Service Centre for this purpose.

All work relevant to safety or on safety-related systems must be carried out at a qualified specialist workshop.

Replacing bulbs

Observe the following:

	Switch off the lighting before replacing bulbs to prevent a short circuit.
	Only touch new bulbs with a clean, lint-free cloth - never with wet or oily fingers.
	Check contacts for corrosion and clean them if necessary.
	Check that all seals are sitting correctly. Replace damaged seals.
	If the new bulb still does not light up, visit a qualified specialist workshop, e.g. a Mercedes-Benz Service Centre.

Headlamps

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Plastic cap

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Plastic cover

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Retainer springs

	Tilting the cab more.
	Remove plastic cap .
or
	Detach retainer springs and remove plastic cover .

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Main-beam headlamp

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Dipped-beam headlamp

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Front foglamps

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Side lamp

Main-beam headlamp

	Disconnect the cable connector from main-beam headlamp .
	Detach the retainer springs and change the bulb.

Dipped-beam headlamp

	Disconnect the cable connector from dipped-beam headlamp .
	Detach the retainer springs and change the bulb.

Side lamp

Disconnect the cable connector from side lamp resources/font_symbols/mbsymb5/mbsymb5_0037.png and replace the bulb.

Front foglamps

	Disconnect the cable connector from front foglamp .
	Detach the retainer springs and change the bulb.

Turn signal lamp, front

Fastening screw

Turn signal

Cable connector

Removing

	Unscrew fastening screw and turn entire turn signal lamp outwards.
	Disconnect cable connector .
	Press the bulb down, turn anti-clockwise and remove it.

Fitting

	Insert the bulb and turn it clockwise as far as it will go.
	Attach it to cable connector .
	Screw on turn signal lamp with fastening screw .

Side-mounted turn signal lamps

Lens

Fastening screw

Bulb

Unscrew fastening screw resources/font_symbols/mbsymb5/mbsymb5_0032.png , unclip lens on the lamp holder and remove it.

Press bulb resources/font_symbols/mbsymb5/mbsymb5_0033.png down, turn it anti-clockwise and replace it.


Depending on the vehicle's equipment, there may be a side marker lamp integrated into the indicator lamp.

Rear lamp cluster

Fastening screws

Perimeter lamp/side marker lamp

Turn signal lamp

Brake lamp

Tail lamp

Rear foglamp

Reversing lamp

6-chamber rear lamp cluster

Fastening screws

Turn signal lamp

Brake lamp

Tail lamp/licence plate lamp

Rear foglamp

Reversing lamp

4-chamber rear lamp cluster

	Unscrew fastening screws and remove the lens.
	Press down the required bulb, turn it anti-clockwise and replace it.
	6-chamber tail lamp: to change the licence plate light bulb, pull out the reflector unit.

Manoeuvring assistance working-area lights

Fastening screws

Lens

Bulb

	Unscrew fastening screws and remove lens .
	Press bulb down, turn it anti-clockwise and replace it.

Perimeter lamp/side marker lamp

Fastening screw

Lens with housing

Bulb

	Unscrew fastening screw and remove lens with housing .
	Press bulb against the contact springs, turn anti-clockwise and remove it.

Perimeter lamp, top

Fastening screw

Lens with housing

Bulb

	Unscrew fastening screw and remove lens with housing .
	Press bulb down, turn it anti-clockwise and replace it.

Entry lamp

Lens with cover frame

Bulb holder

	Prise off lens and cover frame with a screwdriver.
	Press bulb holder down, turn anti-clockwise and remove it.
	Press the bulb down, turn it anti-clockwise and replace it.

Interior light in the low-roof cab

Lens

Reading lamp bulb

Interior light bulb

	Push in the catch springs with a screwdriver and remove lens .
	Replace the faulty bulb.

Interior light in the high-roof cab

Interior light bulb

Nightlight bulb

Reading lamp bulb

	Prise off the lens with a screwdriver.
	Press down interior light /reading lamp bulb , turn it anti-clockwise and replace it.
or
	Pull off the cover and replace nightlight bulb .

Reading lamp, berth

Lens

Bulb

	Prise lens out of the pivot hinge with a screwdriver.
	Replace bulb .

Partially masking headlamps - driving on the left/right

When using the vehicle for international transportation:

In countries where vehicles are driven on the left, a specific area of the headlamp lens must be masked with opaque, self-adhesive tape. This will ensure that you do not dazzle oncoming traffic.

When using the vehicle for international transport or in other countries, observe the relevant national regulations.

Responsibility for the vehicle lighting always rests with the driver.

	Risk of accident
There is a risk of dazzling oncoming traffic with the asymmetrical dipped-beam headlamps in countries where vehicles are driven on the opposite side of the road to the country in which the vehicle was registered. In these countries, you should mask the headlamps as specified by Mercedes-Benz to ensure that you do not dazzle oncoming traffic.

The following illustrations show which area of the headlamp lens must be covered on your vehicle.

	Make masking strips from commercially available opaque adhesive tape, cutting to the size and shape shown in the illustrations.
	Apply to the corresponding area of the headlamp.

Making the headlamp mask yourself

Headlamp, left

Headlamp, right

Headlamp masking surface for left-hand-drive vehicles when in countries where vehicles drive on the left

Headlamp, left

Headlamp, right

Headlamp masking surface for right-hand-drive vehicles when in countries where vehicles drive on the right

Fuses

The fuse box containing the main and auxiliary fuse carriers is located in the footwell on the co-driver's side.

Risk of fire

Do not fit fuses with a higher amperage than specified. This would result in damage to the electrical system or even a fire in the electrical system.

Only use fuses of the specified amperage and do not bridge or repair fuses. Do not replace a fuse until the cause of the malfunction has been traced and rectified.

Fasteners

Upper cover

Lower cover

Main fuse carrier

Auxiliary fuse carrier

	Release fasteners .
	First, remove lower cover and then upper cover .

Checking and replacing

Spare fuses

Fuse extractor

Main fuse carrier

The individual electrical circuits are protected by safety fuses or automatic circuit-breakers.

	If an electrical circuit failure occurs, switch off electrical consumers and visually check the fuse.
	Replace the defective fuse with a spare fuse.
	Switch on electrical consumers and check that they function correctly.

Automatic circuit-breaker

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Tripped

Trigger

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If an automatic circuit-breaker is triggered resources/font_symbols/mbsymb5/mbsymb5_0028.png :

Rectify the cause of triggering and press pin resources/font_symbols/mbsymb5/mbsymb5_0033.png back to on position .

To check the automatic circuit-breaker:

	Pull the automatic circuit-breaker out of the module and press pin to on position .
	Press trigger .
	If pin springs to triggered position , the automatic circuit-breaker is functioning properly.
	Replace the defective automatic circuit-breaker.
	Switch on consumers and check that they function correctly.

Layout of the fuses on the main fuse carrier

Spare fuses

Fuses F1 - F41

Relays

Main fuse carrier base module (GM)

GM	Consumer
F1	Rear foglamps including trailer	10A
F2	Instrument cluster/switch lighting, headlamp cleaning system, distribution (terminal 58)	10A
F3	Additional turn signals	10A
F4	Pop-up roof, 24V radio, frequent-stop brake (terminal 30)	10A
F5	Working-area lamp, LSVA (Swiss heavy goods vehicle fee), (terminal 30)	10A
F6	Unassigned
F7	Distribution (terminal D+)	15A
F8	Exterior mirror heating	10A
F9	24V power sockets	15A
F10	Diagnostic socket, instrument, tachograph (terminal 30)	10A
F11	Trailer socket (terminal 30)	20A
F12	Trailer power socket for ABS (terminal 30)	20A
F13	Interior lighting, Toll Collect (terminal 30)	10A
F14	Headlamp cleaning system	10A
F15	Alternator, transmission, LSVA (Swiss heavy goods vehicle fee), (terminal 15)	10A
F16	Power take-offs	10A
F17	Blower, air conditioning	20A
F18	Radio, telephone, auxiliary heating system, fax, instrument (terminal 15R)	10A
F19	Cigarette lighter	10A
F20	Co-driver's power window	15A
F21	Driver's door control panel	15A
F22	Cleaning system, turn signals (terminal 30)	10A
F23	Right dipped-beam headlamp	10A
F24	Left dipped-beam headlamp	10A
F25	Right main-beam headlamp	10A
F26	Left main-beam headlamp, main-beam indicator lamp	10A
F27	Tail lamp, parking lamp, left-hand side marker lamp, trailer socket, Toll Collect (terminal 58)	10A
F28	Tail lamp, parking lamp, right side marker lamps, trailer socket	10A
F29	Transmission control	10A
F30	Engine control (terminal 15), GGVSE: EMERGENCY OFF	10A
F31	Exterior mirror adjustment, SCR frame module (terminal 15)	10A
F32	All-wheel drive, transmission oil cooling (terminal 15)	10A
F33	Cleaning system, turn signals, trailer socket (terminal 15)	10A
F34	Brake lamp, trailer socket, reversing lamp	10A
F35	Trailer socket, ABS, condensation sensor	10A
F36	Unassigned
F37	Windscreen washer system	10A
F38	Tachograph, instrument, airbag (terminal 15)	10A
F39	Horn, air horn, Toll Collect, diagnostic socket, FleetBoard®, distribution (terminal 15)	10A
F40	Differential locks	10A
F41	Seat heating	10A

Layout of the fuses on the auxiliary fuse carrier

Fuses F1-F14 (A1)

Fuses F1-F14 (A2)

Relays (A31/A32)

Modules A1, A2, A31/A32 on the auxiliary fuse carrier


A vehicle-specific sticker with the fuse assignments is located on the inside of the cover of the fuse box.

A1	Consumer
F1	Auxiliary heating system clock, Toll Collect, FleetBoard® (terminal 30)	10A
F2	Auxiliary heating	20A
F3	Central locking/enhanced central locking system	15A
F4	Enhanced central locking system	10A
F5	Electropneumatic brake, torch socket (terminal 15)	10A
F6	12V socket	15A
F7	Voltage transformer: 24V/12V, 8A	10A
F7	Voltage transformer: 24V/12V, 15A	15A
F8	Central locking/enhanced central locking system, remote control	10A
F9	Compressed-air drier	10A
F10	Non-MB body electrical system	15A
F11	SCR frame module (terminal 30)	15A
F12	Loading tailgate	10A
F13	Transmission control	10A
F14	Working-area lamp	10A

A2	Consumer
F1	Windscreen heating	20A
F2	Daytime driving lights	10A
F3	Windscreen heating	10A
F4	Transmission oil cooling	15A
F4	Allison transmission oil cooling	25A
F5	Unassigned
F6	Unassigned
F7	Auxiliary headlamp	10A
F8	Rotating beacon lamp	10A
F9	Electropneumatic brake (terminal 30)	15A
F10	Mobile phone (terminal 30)	10A
F11	Unassigned
F12	Mobile phone (terminal 15)	10A
F13	Windscreen heating	20A
F14	Electropneumatic brake (terminal 30)	15A