2004 MERCEDES-BENZ ML350 sensor

156 Controls in detailDriving systemsSwitching Parktronic system on / off
You can switch Parktronic system off
manually.
The switch is located on the lower part of
the center console.
1Parktronic off
2Indicator lamp
3Parktronic onSwitching Parktronic off

Press switch on the upper part1.
Indicator lamp2 comes on.
Switching Parktronic on

Press switch on the upper part3.
The indicator lamp2 goes out.!If the Parktronic system is malfunction-
ing, all red segments of the warning in-
dicators light up and an additional
warning sounds.
Contact your Mercedes-Benz Light
Truck Center as soon as possible.
iIf you switch the ignition on, the
Parktronic system will be automatically
switched on.
The rear Parktronic sensors will not au-
tomatically disengage when towing a
trailer. Therefore switch the Parktronic
system off.

212 OperationDriving instructionsTelephones and two-way radios
Radio transmitters, such as a portable tele-
phone or a citizens band unit should only
be used inside the vehicle if they are con-
nected to an antenna that is installed on
the outside of the vehicle.
Refer to the radio transmitter operation in-
structions regarding use of an external an-
tenna.
Catalytic converter
Your Mercedes-Benz is equipped with
monolithic-type catalytic converters, an
important element in conjunction with the
oxygen sensors to achieve substantial con-
trol of the pollutants in the exhaust emis-
sions. Keep your vehicle in proper
operating condition by following our rec-
ommended maintenance instructions as
outlined in your Service Booklet.
Emission control
Certain engine systems serve to keep the
toxic components of the exhaust gases
within permissible legal limits.
These systems, of course, will function
properly only when maintained strictly ac-
cording to factory specifications. Any ad-
justments on the engine should, therefore,
be carried out only by qualified
Mercedes-Benz Light Truck Center autho-
rized technicians. Engine adjustments
should not be altered in any way. More-
over, the specified service jobs must be
Warning!
G
Never operate radio transmitters equipped
with a built-in or attached antenna (i.e. with-
out being connected to an external antenna)
from inside the vehicle while the engine is
running. Doing so could lead to a malfunc-
tion of the vehicle’s electronic system, pos-
sibly resulting in an accident and / or
personal injury.
!To prevent damage to the catalytic con-
verters, use only premium unleaded
gasoline in this vehicle.
Any noticeable irregularities in engine
operation should be repaired promptly.
Otherwise, excessive unburned fuel
may reach the catalytic converter,
causing it to overheat and start a fire.
Warning!
G
As with any vehicle, do not idle, park or op-
erate this vehicle in areas where combusti-
ble materials such as grass, hay or leaves
can come into contact with the hot exhaust
system, as these materials could be ignited
and cause a vehicle fire.

237 Operation
Vehicle care
Cleaning the Parktronic* system
sensors
1Parktronic system sensors
Use a mild car wash detergent, such as
Mercedes-Benz approved Car Sham-
poo, with plenty of water to clean the
sensors1.
When using a steam cleaner or power
washer, aim nozzle only briefly from a min-
imum distance of 4 in (10 cm) at
sensors1.To prevent scratches, never apply strong
force and use only a soft, non-scratchy
cloth when cleaning the sensor. Do not
attempt to wipe dirty sensors with a dry
cloth or sponge.
Wiper blades

Fold wiper arm forward.

Clean the wiper blade inserts with a
clean cloth and detergent solution.Window cleaning

Fold wiper arms forward.

Use a window cleaning solution on all
glass surfaces. An automotive glass
cleaner is recommended.
An automotive glass cleaner is recom-
mended.
Warning!
G
For safety reasons, switch off wipers and re-
move key from steering lock before cleaning
the wiper blades, otherwise the wiper motor
might suddenly turn on and cause injury.
!Fold the windshield wiper arms back
onto the windshield before turning the
key in the steering lock.
Hold on to the wiper when folding the
wiper arm back. If released, the force
of the impact from the tensioning
spring could crack the windshield.Warning!
G
For safety reasons, switch off wipers and re-
move key from steering lock before cleaning
the wiper blades, otherwise the wiper motor
might suddenly turn on and cause injury.

311 Technical terms
ABS
(A
ntilock B
rake S
ystem)
Prevents the wheels from locking up
during braking so that the vehicle can
continue to be steered.
BabySmart
TM airbag deactivation
system
This system detects if a special system
compatible child restraint seat is in-
stalled on the front passenger seat. The
system will automatically deactivate
the passenger front airbag when such a
seat is properly installed (indicator
lamp7 in the instrument cluster
lights up). See your authorized
Mercedes-Benz Light Truck Center for
availability.
BabySmartTM compatible child seats
Special restraint system for children.
The sensor system for the passenger
seat prevents deployment of the pas-
senger front airbag if a BabySmart
TM
compatible child seat is installed.BAS
(B
rake A
ssist S
ystem)
System for potentially reducing braking
distances in emergency braking situa-
tions. The system is activated when it
senses an emergency based on how
fast the brake is applied.
Bi-Xenon headlamps*
Headlamps which use an electric arc as
the light source and produce a more in-
tense light than filament headlamps.
Bi-Xenon headlamps produce low
beam and high beam.
CAC
(C
ustomer A
ssistance C
enter)
Mercedes-Benz customer service cen-
ter, which can help you with any ques-
tions about your vehicle and provide
assistance in the event of a break-
down.CAN system
(C
ontroller A
rea N
etwork)
Data bus network serving to control ve-
hicle functions such as door locking or
windshield wiping.
Cockpit
All instruments, switches, buttons and
indicator / warning lamps in the pas-
senger compartment needed for vehi-
cle operation and monitoring.
Cruise control
Driving convenience system for auto-
matically maintaining the vehicle speed
set by the driver.
Engine number
The number set by the manufacturer
and placed on the cylinder block to
uniquely identify each engine pro-
duced.

318 IndexAir conditioning refrigerant 302
Air outlets
Automatic climate control 142
Air pressure see Tire inflation
pressure 227
Air recirculation mode 138
Activating 139
Deactivating 139
AIRBAG OFF
Warning lamp 243
Airbags 59
BabySmart
TM airbag deactivation
system 311
BabySmartTM deactivation
system 70
Children 60
Front 63
Passenger 63
Safety guidelines 62
Side impact 64
Window curtain 64Alarm
Audible 75, 84, 86
Canceling 84, 86
Visual 83
Alarm system
Anti-theft 83
Anticorrosion/antifreeze 305
Antiglare
Automatic 126
Antilock brake system (ABS) 311
Anti-theft alarm system
Arming 83
Canceling alarm 84, 86
Disarming 84
Anti-theft systems
Anti-theft alarm system 83
Immobilizer 83
Tow-away alarm, glass breakage
sensor 84
Aquaplaning see Hydroplaning 197
Armrest
Storage compartment in front of 165
Storage spaces 165Armrest in rear seat bench 167
Ashtray
Front center console 168
Rear center console 169
ATF (automatic transmission fluid) 222
Attaching a trailer 208
Automatic antiglare for rear view
mirror 126
Automatic central locking
Activating 93
Deactivating 93
Automatic climate control 134
Adjusting air distribution 137
Adjusting air volume 137
Air conditioning 139
Air outlets 142
Air recirculation mode 138
Basic setting 137
Changing basic setting 137
Defrosting 138
Economy mode 135

326 IndexGear range 312
Automatic transmission 121
Limiting 121
Shifting into optimal 120
Gear range limit
Canceling 120
Gear selector lever
Cleaning 238
Position 122
Glass breakage sensor 84
Global Positioning System (GPS) 312
Glossary 311
Glove box 23, 164
Closing 164
Opening 164
Good visibility 126
GPS 312H
Hard plastic trim items
Cleaning 238
Hazard warning flasher 112
Switching off 112
Switching on 112
Head restraints
Manual seats 36
Power seats* 38
Headlamp aim
Adjusting 272
Headlamp cleaning system* 224
Headlamps
Automatic control 108
Bi-Xenon* 311
Cleaning 236
Cleaning system* 131, 224
Refilling washer fluid 224
Switching off 54
Switching on 48
Washer fluid 307
Washer system 307Headliner
Cleaning 238
Heated seats* 98
Height adjustment
Head restraints 36, 38
Seat belts 45
Steering wheel 39
High beam flasher 49, 110
High beam headlamps
Replacing bulbs 266, 269
Switching on 110
High mounted brake lamp 267
Replacing bulbs 271
Hood 217
Closing 218
Opening 217
Hooks
Loading 159
Hydroplaning 197

331 Index
Oil
Adding 221
Consumption 218
Dipstick 218
Oil dipstick 221
Viscosity 312
One-touch gearshifting 120
Canceling gear range limit 120
Downshifting 120
Upshifting 120
Opening
Doors from the inside 90
Fuel filler flap 214
Fuel filler flap manually 263
Glove box 164
Hood 217
Liftgate 89, 91
Liftgate from inside 91
Liftgate from outside 91
Rear quarter windows 146
Side windows 145Sliding/pop-up roof* 148, 265
Sliding/pop-up roof* in an
emergency 265
Storage compartment in front of
armrest 166
Storage compartment under passenger
seat 165
Windows 145
Opening and closing
Side windows 144
Operating
Garage door opener 185
Integrated remote control 185
Radio transmitters 211
Vehicle outside the USA and
Canada 13
Operating safety 17
Operator’s Manual 10
Ornamental moldings 236
Outside temperature indicator 118
Overdue service 233
Overhead control panel 29P
Paintwork 235
Panic alarm 75
Panic button on remote control 75
Parking and locking 53
Parking brake 47, 53
Engaging 53
Releasing 47
Parking lamps
Replacing bulbs 266, 267, 269
Replacing the bulbs 269
Switching on 107
Parktronic* 153, 313
Cleaning system sensor 237
Monitoring reach 154
Sensor cover 237
Switching off 156
Switching on 156
Warning indicators 155

332 IndexPartition net* 159
Engaging 159
Removing 161
Tightening 160
Parts see Spare parts service
Passenger compartment 211
Interior lighting 112
Passenger footwell
Fuse box in 288
Passenger safety see Occupant
safety 58
Pedals 193
Plastic and rubber parts
Cleaning 239
Poly-V-belt drive 314
Layout 293
Positions (Memory function*)
Recalling from memory 106
Storing into memory 106
Power assistance 193Power seat*
Adjusting backrest tilt 38
Adjusting head restraint height 38
Adjusting seat cushion tilt 38
Adjusting seat height 38
Seat fore and aft adjustment 37
Power seats* 37
Power train 314
Power washer 235
Power windows
Blocking of rear door window
operation 73
Side windows 144
Synchronizing 146
Practical hints
First aid kit 257
Fuses 287
Lamps in instrument cluster 242
Spare wheel 259
Towing the vehicle 283
Vehicle jack 258
Vehicle tool kit 257Premium unleaded gasoline 303
Problems
While driving 51
With vehicle 18
Product information 9
Programming or reprogramming the inte-
grated remote control 182
R
Radio transmitters, control and
operation 211
Rain sensor* 130, 131
Rapid seat heating
Switching off 99
Rapid seat heating*
Switching on 98
Reading lamp 29