torque MERCEDES-BENZ SL550 2008 R230 Owner's Manual

326 Operation
Tires and wheels
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 294).
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 400) and
(
page 417).
Warning!G
Have the tightening torque checked after
changing a wheel. Wheels could become
loose if not tightened with a torque of
96 lb-ft (130 Nm).
Only use genuine Mercedes-Benz wheel
bolts specified for your vehicle’s rims.

424 Practical hints
Flat tire
Detach the electric air pump.
Stow the electrical plug and the air
hose behind the flap and place the air
pump back in the trunk.
Lowering the vehicle
Lower vehicle by turning crank coun-
terclockwise until the full weight of the
vehicle is resting on the ground.
Pull the jack out of the jack support
tube.1 - 5 Wheel bolts
Tighten the five wheel bolts evenly,
following the diagonal sequence
illustrated (1 to 5), until all bolts
are tight. Observe a tightening torque
of 96 lb-ft (130 Nm).
Warning!G
Follow recommend inflation pressures.
Do not overinflate tires. Overinflating tires
can result in sudden deflation (blowout) be-
cause they are more likely to become punc-
tured or damaged by road debris, potholes,
etc.
Do not underinflate tires. Underinflated tires
wear unevenly, adversely affect handling
and fuel economy, and are more likely to fail
from being overheated.
Do not overload the tires by exceeding the
specified load limit as indicated on the Tire
and Loading Information placard on the
driver’s door B-pillar. Overloading the tires
can overheat them, possibly causing a
blowout. Overloading the tires can also
result in handling or steering problems, or
brake failure.
iThe flat tire may be transported in the trunk
when the retractable hardtop is raised. If avail-
able, use a protective sheet on the spare wheel.
Vehicles with TPMS or Advanced TPMS*:
Do not activate the tire inflation pressure moni-
tor until a full size wheel/tire with functioning
sensor has been placed back into service on the
vehicle.
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
96 lb-ft (130 Nm).


447 Technical data
Engine
Engine
ModelSL 550 (230.471)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.
SL 600 (230.477)1
Engine273275
Mode of operation4-stroke engine, gasoline injection4-stroke engine, gasoline injection
No. of cylinders812
Bore3.86 in (98.00 mm)3.23 in (82.00 mm)
Stroke3.56 in (90.50 mm)3.43 in (87.00 mm)
Total piston displacement333.3cu in (5461cm3)336.4 cu in (5 513 cm3)
Compression ratio10.7:19:1
Output acc. to SAE J 1349382 hp/6 000 rpm2
(285 kW/6 000 rpm)
2Premium fuel required. Performance may vary with fuel octane rating.
510 hp/5 000 rpm2
(380 kW/5 000 rpm)
Maximum torque acc. to SAE J 1349391 lb-ft/2 800 - 4 800 rpm
(530 Nm/2 800 - 4 800 rpm)612 lb-ft/1 900 - 3 500 rpm
(830 Nm/1 900 - 3 500 rpm)
Maximum engine speed6 500 rpm5 950 rpm
Firing order1-5-4-2-6-3-7-81-12-5-8-3-10-6-7-2-11-4-9
Poly-V-belt2 398 mm2 335 mm

448 Technical data
Engine
ModelSL 55 AMG (230.474)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.
SL 65 AMG (230.479)1
Engine113275
Mode of operation4-stroke engine, gasoline injection4-stroke engine, gasoline injection
No. of cylinders812
Bore3.82 in (97.00 mm)3.25 in (82.60 mm)
Stroke3.62 in (92.00 mm)3.66 in (93.00 mm)
Total piston displacement331.8 cu in (5439 cm3)364.9 cu in (5980 cm3)
Compression ratio9:19:1
Output acc. to SAE J 1349510 hp/6 100 rpm2
(380 kW/6 100 rpm)
2Premium fuel required. Performance may vary with fuel octane rating.
603 hp/4 800-5 100 rpm2
(450 kW/4 800-5 100 rpm)
Maximum torque acc. to SAE J 1349530 lb-ft/2 600 - 4 000 rpm
(720 Nm/2 600 - 4 000 rpm)738 lb-ft/2 000 - 4 000 rpm
(1 000 Nm/2 000 - 4 000 rpm)
Maximum engine speed6500 rpm5950 rpm
Firing order1-5-4-2-6-3-7-81-12-5-8-3-10-6-7-2-11-4-9
Poly-V-belt2 462 mm/1 289 mm2335 mm

454 Technical data
Electrical system
ModelSL 550SL 600SL 55 AMGSL 65 AMG
Generator (alternator)14 V/180 A14 V/180 A14 V/180 A14 V/180 A
Starter motor12 V/1.7 kW12 V/1.7 kW12 V/1.7 kW12 V/1.7 kW
Starter battery12 V/35 Ah12 V/35 Ah12 V/35 Ah12 V/35 Ah
Battery for electrical consumers12 V/70 Ah12 V/70 Ah12 V/70 Ah12 V/70 Ah
Spark plugsNGK PLKR7ANGK IFR6QGNGK ILFR6ANGK IFR6QG
Electrode gap0.031 in (0.8 mm)0.028 in (0.7 mm)0.031 in (0.8 mm)0.028 in (0.7 mm)
Tightening torque15 – 18 lb-ft
(20 – 25 Nm)18 – 22 lb-ft
(25 – 30 Nm)18 – 22 lb-ft
(25 – 30 Nm)18 – 22 lb-ft
(25 – 30 Nm)

483 Index
Telephone* 30, 247
Answering a call 170
Changing mobile phone cradle 250
Compartment 239
Dialing 170
Ending a call 171
Inserting in cradle 248
Installing a different mobile phone
cradle 250
Loading phone book* 171
Messages in the multifunction
display 396
Operating 169
Redialing 171
Removing from cradle 249
Telephones and two-way radios 276
Temperature
Outside temperature indicator 142
Sensor, Interior 33
Tires 301
Tightening torque 424
Time
Settings (control system) 161TIN 324
Tire
Vehicle maximum load on 325
Tire and Loading Information 295
Tire and loading terminology 322
Tire care and maintenance 292
Tire Identification Number see TIN
Tire inflation pressure
Checking 281, 300, 302
Checking tire pressure electronically
with the Advanced Tire Pressure
Monitoring System (Advanced
TPMS)*, (Canada only) 308
Checking tire pressure electronically
with the Tire Pressure Monitoring
System (TPMS), (USA only) 305
Tire inflation pressure see the placard on
the fuel filler flap
Tire inspection 292
Tire load rating 324
Tire ply composition and material
used 324
Tire speed rating 273, 315, 325
Tire terminology 322
Tire traction 273Tires 291
Advanced Tire Pressure Monitoring
System (Advanced TPMS)*, (Canada
only) 308
Cleaning 293
Direction of rotation 294
Driving instructions 271
Low tire pressure telltale 355
Messages in display 397
Messages in the multifunction
display 375, 397
MOExtended*425
Retreads 291
Rims and tires 449
Rotating 325
Run Flat Indicator (Canada only) 303
Service life 292
Spare wheel 453
Temperature 301, 321
Tire Pressure Monitoring System
(TPMS), (USA only) 305
TPMS malfunction telltale 355
Tread depth 293, 328
Wear pattern 326
Winter 327

485 Index
Vehicle care
Carpets 339
Cleaning and care 333
Distronic* system sensor cover 336
Engine cleaning 335
Gear selector lever 339
Headlamps, tail lamps, etc. 336
Headliner 340
Leather upholstery 340
Light alloy wheels 338
Ornamental moldings 336
Paintwork 334
Parktronic* system sensors 337
Plastic and rubber parts 339
Power washer 334
Seat belts 340
Steering wheel 339
Tar stains 334
Upholstery 340
Washing 335
Windows 337
Wiper blades 337
Wood trims 340Vehicle Identification Number see VIN
Vehicle level
Changing 232
Setting 232
Vehicle level control (ABC) 230
Vehicle level control switch 32
Vehicle lighting
Checking 281
Vehicle loading terminology 322
Vehicle maximum load on the tire 325
Vehicle status messages 359
Vehicle tool kit 400
VIN 445
Voice control system* 25W
Warning sounds
Distance warning function* 229
Distronic* 221
Driver’s seat belt 82
Exterior lighting 65, 114, 131
Parking brake 56
Warranty coverage 443
Washing the vehicle 335
Wear pattern (tires) 326
Wheel bolts
Tightening torque 424
Wheel change 417
Tightening torque 424
Wheel wrench 401
Wheels
Tires and wheels 291
Wind screen 209
Installing 209
Removing 210
Windows see Side windows
Windows, cleaning 337