1997 MERCEDES-BENZ ML320 bulb

214 What you should know at the gas station
Te ch n ica l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index
•Bulbs
high beam: H1 U (55 W),
low beam: H7 (55 W)
low beam: Xenon D2R - 35 W (optional)
fog lamps (optional): H3 U (55 W),
turn signal, parking, side marker and standing
lamps, front: 1157 (32 / 3 cp),
turn signal lamp, side: W 5 W (168 [3 cp]),
stop lamps: P 21 W (1073 [32 cp]),
backup lamps: P 21 W (1073 [32 cp]),
turn signal lamps, rear: P Y 21 W,
tail, parking, side marker, standing, and rear fog
lamp, driver’s side: P 21/4 W,
license plate lamps: C 5 W (tubular),
high mounted stop lamp: P 21 W (1073 [32 cp]).

215 Check regulary and before a long trip
Te ch n ica l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index Check regularly and before a long trip 1Engine oil level
See “Checking engine oil level” on page 233 and
“Engine oil level indicator” on page 89.
2Coolant level
See “Coolant level” on page 234.
3Brake fluid
See “Brake fluid” on page 294.
4Windshield washer system/
Headlamp cleaning system/
Rear window washer system
For refilling reservoir see page 236.
Opening hood, see page 231.
Ve h i c l e l i g h t i n g : Check function and cleanliness. For
replacement of light bulbs, see “Exterior lamps” on
page 260.
Exterior lamp switch, see page 90.

218 Malfunction and indicator lamps
Te ch n ica l
data Instruments
and controlsOperation DrivingInstrument
cluster displayPractical hints Car care Index
Malfunction and indicator lamps
in the instrument cluster
General information:
If a bulb in the instrument cluster fails to light up
during the bulb self-check when turning the key in
steering lock to position 2, have it checked and replaced
if necessary.
On-board diagnostic system
Check engine malfunction indicator lamp
Engine malfunction indicator lamp. If the
“CHECK ENGINE” malfunction indicator
lamp comes on when the engine is running,
it indicates a malfunction of the fuel management
system, emission control system, systems which impact
emissions, or the fuel cap is not closed tight (check the
fuel cap). If the “CHECK ENGINE” lamp is illuminated
continuously and the vehicle is driving normally, you
may still drive the vehicle, however, in all cases, we
recommend that you have the system checked at your
authorized Mercedes-Benz Light Truck Center as soon
as possible.
If the “CHECK ENGINE” lamp comes on continuously
and / or the vehicle is not driving normally (e.g.
malfunction of the fuel management system or running out of fuel), serious damage can occur to the emission
system. Please contact your authorized Mercedes-Benz
Light Truck Center immediately.
The Sequential Multiport Fuel Injection (SFI) control
module monitors emission control components that
either provide input signals to or receive output signals
from the control module. Malfunctions resulting from
interruptions or failure of any of these components are
indicated by the “CHECK ENGINE” malfunction
indicator lamp in the instrument cluster and are
simultaneously stored in the SFI control module.
If the “CHECK ENGINE” malfunction indicator lamp
comes on, have the system checked at your authorized
Mercedes-Benz Light Truck Center as soon as possible.
With some exceptions, the control module switches off
the “CHECK ENGINE” malfunction indicator lamp if the
condition, causing the lamp to come on, no longer exists
during three consecutive cycles. See also page 220 for
fuel cap placement warning.
An on-board diagnostic connector is located in the
passenger compartment near to the parking brake
pedal, allowing the accurate identification of system
malfunctions through the readout of diagnostic trouble
codes.
CHECK
ENGINE

260 Exterior lamps
Te ch n ica l
data Instruments
and controlsOperation DrivingInstrument
cluster displayPractical hintsCar care Index
Exterior lamps
Headlamp adjustment
Correct headlamp adjustment is extremely important.
Check and readjust headlamps at regular intervals and
when a bulb has been replaced.
For adjusting headlamp aim see page 268.Replacing bulbs
To prevent a possible electrical short circuit, switch off
lamp prior to replacing a bulb.
When replacing bulbs, install only 12 volt bulbs with
the specified watt rating.
When replacing halogen bulbs do not touch glass
portion of bulb with bare hands. Use plain paper or a
clean cloth.
Wa r n i n g !
Bulbs and bulb holders can be very hot. Allow the
lamp to cool down before changing a bulb.
Halogen lamps contain pressurized gas. A bulb can
explode if you:
• touch or move it when hot,
•drop the bulb,
•scratch the bulb.Wear eye and hand protection.
Wa r n i n g !
Because of high voltage in Xenon lamps, it is
dangerous to replace the bulb of repair the lamp
and its components. We recommend that you have
such work done by a qualified technician.

261 Exterior lamps
Te ch n ica l
data Instruments
and controlsOperation DrivingInstrument
cluster displayPractical hintsCar care Index Headlamp assembly (Halogen)
1Headlamp vertical adjustment screw
2Headlamp horizontal adjustment screw
3Headlamp cover with locking tab
4Bulb socket for turn signal, parking, standing, and
side marker lamp5Electrical connector for low beam headlamp bulb
6Electrical connector for high beam headlamp bulb
7Level for headlamp vertical adjustment
8Scale for headlamp horizontal adjustment
9Auxiliary fog lamp (if so equipped)

262 Exterior lamps
Te ch n ica l
data Instruments
and controlsOperation DrivingInstrument
cluster displayPractical hintsCar care Index
Headlamp assembly (Xenon)
1Headlamp vertical adjustment screw
2Headlamp horizontal adjustment screw
3Headlamp cover with locking tab
4Bulb socket for turn signal, parking, standing, and
side marker lamp5Electrical connector for low beam headlamp bulb
6Electrical connector for high beam headlamp bulb
7Auxiliary fog lamp (if so equipped)

263 Exterior lamps
Te ch n ica l
data Instruments
and controlsOperation DrivingInstrument
cluster displayPractical hintsCar care Index Bulbs for high beam (only Halogen headlamps)
H1 U (55 W)
Bulbs for low beam
H7 (55 W)
Open hood.
Push down tab at top end of cover (3) and remove. Pull
off electrical connector (5 or 6). Unhook and move aside
clamping ring. Remove bulb.
Insert new bulb (seating properly in cutouts of bulb
socket), mount clamping ring. Reinstall and push
electrical connector on securely. Reinstall cover (3).Xenon (optional)
Bulb for low beam
Xenon (optional)
Bulb for high beam
Note:
Vehicles with Xenon headlamps:
We recommend that you have changed the bulb for the
high beam by a qualified technician.
Wa r n i n g !
Because of high voltage in Xenon lamps, it is
dangerous to replace the bulb or repair the lamp
and its components. We recommend that you have
such work done by a qualified technician.

264 Exterior lamps
Te ch n ica l
data Instruments
and controlsOperation DrivingInstrument
cluster displayPractical hintsCar care Index
Parking, standing, side marker and turn signal lamp
115 6 N A ( 3 2 / 4 c p b u l b )
Open hood.
Twist bulb socket (4) counterclockwise and pull out.
Push bulb into socket, turn counterclockwise and
remove.
Insert new bulb in socket, push in and twist clockwise.
Reinstall bulb socket.Bulbs for auxiliary fog lamp (optional)
H3 U (55 W)
Open hood.
Remove cover (9). Unhook clamping ring and remove
bulb. Pull off electrical connector.
Insert new bulb in socket (seating properly in cutouts of
bulb socket), and mount clamping ring. Reinstall and
push electrical connector on securely.
Reinstall cover (9).