2005 MERCEDES-BENZ C240 torque

289 Operation
Tires and wheels
Rotating tires
Tire rotation can be performed on vehicles
with tires of the same dimension all
around. If your vehicle is equipped with
tires of the same dimension all around,
tires can be rotated, observing a a
front-to-rear rotation pattern that will
maintain the intended rotation (spinning)
direction of the tire (
page 287).
In some cases, such as when your vehicle
is equipped with mixed-size tires (different
tire dimension front vs. rear), tire rotation
is not possible.If applicable to your vehicle's tire configu-
ration, tires can be rotated according to
the tire manufacturer's recommended in-
tervals in the tire manufacturer's warranty
pamphlet located in your vehicle literature
portfolio. If none is available, tires should
be rotated every 3 000 to 6 000 miles
(5 000 to 10 000 km), or sooner if neces-
sary, according to the degree of tire wear.
The same rotation (spinning) direction
must be maintained (
page 287).
Rotate tires before the characteristic tire
wear pattern becomes visible (shoulder
wear on front tires and tread center wear
on rear tires).
Thoroughly clean the mounting face of
wheels and brake disks, i.e. the inner side
of the wheels/tires, during each rotation.
Check for and ensure proper tire inflation
pressure.For information on wheel change, see the
“Practical hints” section (
page 329) and
(
page 353).
Warning!
G
Rotate front and rear wheels only if the tires
are of the same dimension.
If your vehicle is equipped with mixed-size
tires (different tire dimensions front vs.
rear), tire rotation is not possible.
Warning!
G
Have the tightening torque checked after
changing a wheel. Wheels could become
loose if not tightened with a torque of
80 lb-ft (110 Nm).
Only use genuine Mercedes-Benz wheel
bolts specified for your vehicle's rims.

359 Practical hints
Flat tire
Lowering the vehicle
Lower vehicle by turning crank
counterclockwise until vehicle is
resting fully on its own weight.

Remove the jack.1 - 5Wheel bolts

Tighten the five wheel bolts evenly,
following the diagonal sequence
illustrated (1to5), until all bolts are
tight. Observe a tightening torque
of 80 lb-ft (110 Nm).Before storing the jack, it should be fully
collapsed, with handle folded in (storage
position) (
page 331).

Store the jack and the other vehicle
tools in the trunk.
Warning!
G
Vehicles with collapsible tire
(C 55 AMG only):
Inflate collapsible tire only after the wheel is
properly mounted.
Inflate the collapsible tire using the electric
pump (
page 357) before
lowering the ve-
hicle.
Warning!
G
Have the tightening torque checked after
changing a wheel. The wheels could come
loose if they are not tightened to a torque
of 80 lb-ft (110 Nm).

378 Technical dataEngineModel
C 230 Kompressor (203.040)
1 (Canada only)
C 230 Kompressor Sport (203.040)
1
1The quoted data apply only to the standard vehicle. See an authorized Mercedes-Benz Center for the corresponding data of all special bodies and special equipment.
C 240 (203.061)
1
C 240 4MATIC (203.081)
1
Engine
271
112
Mode of operation
4-stroke engine, gasoline injection
4-stroke engine, gasoline injection
No. of cylinders
4
6
Bore
3.23 in (82.00 mm)
3.54 in (89.90 mm)
Stroke
3.35 in (85.00 mm)
2.68 in (68.20 mm)
Total piston displacement
109.6 cu in (1 796 cm
3)
158.5 cu in (2 597 cm
3)
Compression ratio
8.5:1
10.5:1
Output acc.
to SAE J 1349
189 hp/5 800 rpm
2
(141 kW/5 800 rpm)
2Premium fuel required. Performance may vary with fuel octane rating.
168 hp/5 500 rpm
2
(125 kW/5 500 rpm)
Maximum torque acc.
to SAE J 1349
192 lb-ft/3 500 - 4 000 rpm
(260 Nm/3 500 - 4 000 rpm)
177 lb-ft/4 500 rpm
(240 Nm/4 500 rpm)
Maximum engine speed
6 000 rpm
6200 rpm
Firing order
1-3-4-2
1-4-3-6-2-5
Poly-V-belt
2 420 mm
2380 mm

379 Technical data
Engine
Model
C 320 (203.064)
1 (USA only)
C 320 Sport (203.064)
1
C 320 4MATIC (203.084)
1
C 55 AMG (203.076)
1
Engine
112
113
Mode of operation
4-stroke engine, gasoline injection
4-stroke engine, gasoline injection
No. of cylinders
6
8
Bore
3.54 in (89.90 mm)
3.82 in (97.00 mm)
Stroke
3.31 in (84.00 mm)
3.60 in (92.00 mm)
Total piston displacement
195.2 cu in (3 199 cm
3)
331.8 cu in (5 439 cm
3)
Compression ratio
10:1
11:1
Output acc. to SAE J 1349
215 hp/5 700 rpm
2
(160 kW/5 700 rpm)
362 hp/5 750 rpm
2
(270 kW/5 750 rpm)
Maximum torque acc. to SAE J 1349
229 lb-ft/3 000 - 4 600 rpm
(310 Nm/3 000 - 4 600 rpm)
376 lb-ft/4 000 rpm
(510 Nm/4 000 rpm)
Maximum engine speed
6000 rpm
6700 rpm
Firing order
1-4-3-6-2-5
1-5-4-2-6-3-7-8
Poly-V-belt
2380 mm
2380 mm
1The quoted data apply only to the standard vehicle. See an authorized Mercedes-Benz Center for the corresponding data of all special bodies and special equipment.2Premium fuel required. Performance may vary with fuel octane rating.

384 Technical dataElectrical systemModel
C 230 Kompressor (all models)
C 240 (all models)
C 320 (all models)
C55AMG
Generator (alternator)
14 V/120 A
14 V/120 A
14 V/150 A
Starter motor
12 V/1.1 kW
12 V/1.7 kW
14 V/1.7 kW
Battery
12 V/100 Ah
12 V/100 Ah
12 V/100 Ah
Spark plugs
Bosch F 6 MPP 332
Bosch F 8 DPP 332
NGK PFR 5 R-11
NGK ILFR 6 A
Electrode gap
0.031 in (0.8 mm)
0.039 in (1.0 mm)
0.031 in (0.8 mm)
Tightening torque
18–22lb-ft (25–30Nm)
15–22lb-ft (20–30Nm)
18–22lb-ft (25–30Nm)

402 Technical termsPower train
Collective term designating all
components used to generate and
transmit motive power to the drive
axles, including


engine


clutch/torque converter


transmission


transfer case


drive shaft


differential


axle shafts/axles
Program mode selector switch
Used to switch the automatic
transmission* between standard
operationS, comfort operationC and
manual operationM (C 55 AMG only).REST
(Residual engine heat utilization)
Feature that uses the engine heat
stored in the coolant to heat the
vehicle interior for a short time after
the engine has been turned off.
Restraint systems
Seat belts, belt tensioners, air bags
and child restraint systems. As inde-
pendent systems, their protective
functions complement one another.
RON
(R
esearch O
ctane N
umber)
The Research Octane Number for gaso-
line as determined by a standardized
method. It is an indication of a gaso-
line's ability to resist undesired deto-
nation (knocking). The average of both
the ->MON (Motor Octane Number)
and RON (Research Octane Number) is
posted at the pump, also known as
ANTI-KNOCK INDEX.Shift lock
When the vehicle is parked, this lock
prevents the transmission gear
selector lever from being moved out of
positionP without SmartKey turned
and brake pedal depressed.
SRS
(S
upplemental R
estraint S
ystem)
Seat belts, emergency tensioning
device and air bags. Though indepen-
dent systems, they are closely inter-
faced to provide effective occupant
protection.

403 Technical terms
Tele Aid* System
(T
elematic A
larm I
dentification on
D
emand)
The Tele Aid system consists of three
types of response: automatic and
manual emergency, roadside assis-
tance and information. Tele Aid is
initially activated by completing a
subscriber agreement and placing an
acquaintance call.
The Tele Aid system is operational
provided that the vehicle’s battery is
charged, properly connected, not
damaged and cellular and GPS
coverage is available.Telematics*
A combination of the terms “tele-
communications” and “informatics”.
Tightening torque
Force times lever arm (e.g. a lug
wrench) with which threaded fasteners
such as wheel bolts are tightened.
Tire speed rating
Part of tire designation; indicates the
speed range for which a tire is
approved.
Traction
Force exerted by the vehicle on the
road via the tires.VIN
(V
ehicle I
dentification N
umber)
The number set by the manufacturer
and placed on the body to uniquely
identify each vehicle produced.
Voice control system*
1
Voice control system for car phones,
portable cell phones and audio
systems (radio, CD, etc.).
1Feature description is based on preliminary infor-
mation at time of printing. At time of printing, no
date for availability of voice control had been set.
Contact an authorized Mercedes-Benz Center for
details and availability for your vehicle model.

431 Index
Technical data
Air conditioning refrigerant 390
Brake fluid 390
Coolant 387, 388
Coolants 394
Electrical system 384
Engine 378
Engine oil additives 390
Engine oils 390
Flexible fuel vehicles 392
Fuel requirements 391
Fuels 387, 388
Gasoline additives 392
Lubricants 387
Main dimensions 385
Premium unleaded gasoline 391
Rims and tires 380
Weights 386
Windshield washer 389
Windshield washer and headlamp
cleaning* system 389, 396Tele Aid* 248
Emergency calls 250
Hands-free microphone 29
Information 253
Initiating an emergency
call manually 251
Message in display 328
Remote door unlock 255
Roadside Assistance 252
SOS button 251
Stolen Vehicle Recovery
services 256
System self-check 249
Tele Aid System 249, 403
Upgrade scenario 254
Telematics* 403
Telephone* 26, 247
Answering a call 151
Dialing a number from
the phone book 152
Ending a call 152
Hands-free microphone 29Loading phone book 152
Message in display 328
Operation 150, 208
Redialing 153
Temperature
Display mode 135
Grades of tires 398
Setting interior temperature 177
Setting units in display 135
Tires 288
Tie-down rings* (Trunk) 240
Tightening torque
(Wheel bolts) 359, 403
Tilt
Head restraint, manual seat 37
Head restraint, power seat* 39
Tilt/sliding sunroof*
Closing 227, 341
Closing with SmartKey 229
Messages in display 328
Opening 227, 341
Opening with SmartKey 229
Stopping 229
Synchronizing 230