2003 MERCEDES-BENZ C320 4MATIC fuel type

231 Operation
Driving instructions
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 systems of the engine serve to
keep the toxic components of the exhaust
gases within permissible limits required by
law.
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 Center authorized techni-
cians. Engine adjustments should not be
altered in any way. Moreover, the specified
service jobs must be carried out regularly
according to Mercedes-Benz servicing re-
quirements. For details refer to the Service
Booklet.
!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.

287 Practical hints
Unlocking/locking in an emergency
SmartKey
1Mechanical key
2Battery compartment
Replacement batteries: Lithium, type
CR 2025 or equivalent.
Remove mechanical key1
(page 285).

Insert the mechanical key in side open-
ing and push gray slide.
The battery compartment2 is un-
latched.

Pull the battery compartment2 out of
the key housing in direction of arrow.3Battery
4Contact spring

Remove the batteries.

Using a lint-free cloth, insert new bat-
teries under the contact spring with the
plus (+) side facing up.

Return battery compartment into hous-
ing until it locks into place.
Fuel filler flap
Open trunk lid.

Fold away right-side tail lamp trim.

Reach inside through opening2.

Turn release knob1 clockwise (arrow).
The fuel filler flap can now be opened.

354 Index
Messages in display 269
Switching off 76
Switching on 77
Warning lamp 256
ETD 64, 342
Safety guidelines 59
Ethanol fuel
At the gas station 233
Requirements 334
Switching fuels 334
Exterior lamp switch 47, 101
Exterior lamps
Delayed shut-off 126
Exterior rear view mirrors
Adjusting 39
Parking position* for 131
F
Fahrenheit
Setting temperature units 123
Fastening the seat belts 41
Fine adjustment
Cruise control 195
First aid kit 279
Flat tire 297
Lowering the vehicle 301
Mounting the spare wheel 297Preparing the vehicle 297
Spare wheel 281
Flexible fuel vehicles 334
At the gas station 233
Switching fuels 334
Flexible Service System (FSS) 247, 342
Fog lamp, rear 103, 291
Fog lamps
Replacing bulbs 290
Fog lamps, front 103
Messages in display 274
Replacing bulbs 291
Switching on 103
Four wheel electronic traction system
(4MATIC) with ESP 78
4MATIC 78
Front airbags 60
Front lamps
Bi-Xenon type* 293
Halogen-type 292
Messages in display 272–275
Replacing bulbs 290, 292
Switching on 101
Front seat head restraints
Installing 94
Manual seat 94Power seat* 94
Removing 94
Front seats
Heater* 97
FSS (Flexible Service System) 247, 342
Fuel 234
Additives 334
Cruising range 335
E85 (Ethanol fuel) 335
Fuel reserve warning lamp 259
Gasoline additives 334
Premium unleaded
gasoline 234, 330, 333
Requirements 333, 334
Reserve warning 23
Switching (Flexible fuel vehicle) 334
Technical data 329
Fuel additives 334
Fuel consumption statistics
After start 132
Since last reset 132, 133
Fuel filler flap 233
Locking 233
Opening 287
Unlocking 233

355 Index
Fuel requirements 333
For ethanol fuel 334
Fuel reserve tank
Message in display 272
Fuel tank
Capacity 330
Filler flap 233
Fuels, coolants, lubricants etc.
Capacities 329
Functions (control system) 112, 115
Resetting 120
Fuse box 312
Fuse chart 312
Fuse extractor 313
Fuses 312
Auxiliary fuse box in the trunk 313
F us e box in e ng ine com pa rtm ent 3 12
Fuse box in passenger
compartment 312
Fuse chart 312
Fuse extractor 313
Spare fuses 313G
Garage door opener 27, 217
Erasing in remote control 220
Integrated remote control 218
Rolling code programming 219
Gasoline see Fuel 234
Gasoline additives 334
Gear range 342
Automatic transmission 140
Limiting 140
Shifting into optimal 139
Gear range limit
Canceling 139
Gear selector lever
Cleaning 252
Position 141
Global
Locking 85
Unlocking 85
Global Positioning System (GPS) 342
Glove box 21, 203
Closing 203
Opening 203
Good visibility 144
GPS 342
GPS see COMAND* 210H
Halogen-type
Front lamp bulbs 292
Hand-held transmitter
Programming integrated remote
control 218
Hands-free microphone 27
Hard plastic trim items
Cleaning 252
Hazard warning flasher 104
Switching off 104
Switching on 104
Head restraints 94
Manual seats 33
Power seats* 35
Rear seats 35
Headlamp cleaning system* 241
Headlamp shut-off delay
see Delayed shut-off, exterior lamps
Headlamps
Automatic control 102
Bi-Xenon type*
Replacing bulbs 293
Bi-Xenon* 341
Cleaning 251
Cleaning system* 146, 241, 338

363 Index
Fuses 313
High beam bulbs 292
High beam bulbs
(xenon-type* headlamps) 293
License plate lamp bulbs 295
Low beam bulbs 292
Parking lamp bulbs 293, 294
Rear fog lamp bulb 295
Rear lamp bulbs 291, 295
Rear turn signal bulbs 295
Side marker lamp bulbs 294
Standing lamp bulbs 293, 294
Wiper blade insert 296
Wiper blades 296
Reporting
Safety defects 18
Reset knob in the
instrument cluster 23, 120
Resetting
All functions (control system) 120
All functions of a submenu 120
Fuel consumption 132, 133
Service indicator (FSS) 248
Trip odometer 109
Residual heat utilization 163
Residual ventilation 163Restraint system see Infant and child
restraint systems 65, 68, 344
Reverse (manual transmission)
Shifting into 137
Rims 322
Roadside Assistance 12
Rolling code programming 219
RON
(Research Octane Number) 234, 344
Roof rack* 196
Rotating wheels 244
Rubber parts
Cleaning 252
S
Safety
Occupant 56
Safety belts see Seat belts 41
Safety defects
Reporting 18
Safety systems
Driving 73
Saving current speed 194
Searching
Radio station 117Seat belt force limiter 64
Seat belt height adjustment 43
Seat belts 61
Cleaning 252
Fastening 41
Height adjustment 43
Proper use of 43, 63
Safety guidelines 59
Warning lamp 259
Seat cushion depth
Adjusting 96
Seat heater*
Switching off 97
Switching on 97
Seats 93
Adjusting 32, 33
Easy entry/exit feature* 93
Heater* 97
Manual seat 33
Multicontour seat* 96
Power seat* 34
Rapid seat heating* 97
Split rear bench seat* 199
Selecting
Display 124