2008 MERCEDES-BENZ SL55AMG belt

352 Practical hints
What to do if …
ProblemPossible cause/consequenceSuggested solution
on for a maximum of 6 seconds
after starting the engine.The seat belt telltale reminds you and your
passenger to fasten your seat belts before
driving off.Fasten your seat belts.
Regardless of whether the seat belts
are fastened or not, the seat belt tell-
tale always comes on and remains lit
for 6 seconds after starting the en-
gine.
maximum of 6 seconds after
starting the engine.You have forgotten to fasten your seat belt.Fasten your seat belt.
The warning chime stops sounding.
on while the vehicle is standing
still and the engine is running or
during driving.You and/or your passenger have forgotten to
fasten your seat belts.Fasten your seat belts.
The seat belt telltale goes out.
There are items placed on the passenger seat
and therefore the system senses the passen-
ger seat as being occupied.Remove the items from the passenger
seat and put them in a safe place.
The seat belt telltale goes out.

353 Practical hints
What to do if …
ProblemPossible cause/consequenceSuggested solution
telltale flashes and you addition-
ally hear an intermittent warning
chime with increasing intensity.The vehicle’s speed once exceeds
15 mph (25 km/h) and you and/or your
passenger have forgotten to fasten your seat
belts.Fasten your seat belts.
The seat belt telltale goes out and the
warning chime stops sounding.
There are items placed on the passenger seat
and therefore the system senses the passen-
ger seat as being occupied.Remove the items from the passenger
seat and put them in a safe place.
The seat belt telltale goes out and the
warning chime stops sounding.
iAfter 60 seconds with an unfastened seat
belt, the warning chime stops sounding and the
seat belt telltale illuminates continuously. The
seat belt telltale will only go out if both, the
driver’s and passenger’s seat belt are fastened,
or the vehicle is standing still and a door is
opened.

376 Practical hints
What to do if …
Symbol messages
Left displayRight displayPossible cause/consequencePossible solution
# The battery is no longer charging.
Possible causes:

alternator malfunctioning

broken poly-V-belt
Do not forget that the brake system
requires electrical energy and may
be operating with restricted capa-
bility. Considerably greater brake
pedal force is required and the stop-
ping distance is increased.
Stop the vehicle immediately in a safe loca-
tion and check the poly-V-belt.
If it is broken:
Do not continue to drive. Otherwise, the
engine will overheat due to an inoperative
water pump which may result in damage
to the engine. Contact an authorized
Mercedes-Benz Center.
If it is in order:
Contact an authorized Mercedes-Benz
Center immediately. Adjust driving to be
consistent with reduced braking respon-
siveness.
There is a malfunction in the elec-
tronic system.Have the system checked at an authorized
Mercedes-Benz Center as soon as possible.

383 Practical hints
What to do if …
Left displayRight displayPossible cause/consequencePossible solution
•Coolant
Stop car,

switch engine off.
The coolant is too hot.
Among other possible causes, the
poly-V-belt could be broken.Stop the vehicle in a safe location or as soon
as it is safe to do so.
Turn off the engine.
Check the poly-V-belt.
If it is broken:
Do not continue to drive. Otherwise, the
engine will overheat due to an inoperative
water pump which may result in damage to
the engine. Contact an authorized
Mercedes-Benz Center.
If it is intact:
Wait for the message to disappear before
restarting the engine.
Doing otherwise could result in serious engine
damage that is not covered by the
Mercedes-Benz Limited Warranty.
(Continued on next page)

441 Technical data
Parts service
Warranty coverage
Identification labels
Layout of poly-V-belt drive
Engine
Rims and tires
Electrical system
Main dimensions
Weights
Fuels, coolants, lubricants, etc.

446 Technical data
Layout of poly-V-belt drive
SL 550
1Idler pulley
2Idler pulley
3Automatic belt tensioner
4ABC tandem pump (pump for
power-steering assistance and ABC
chassis)
5Air conditioning compressor
6Crankshaft
7Coolant pump
8Generator (alternator)SL 55 AMG
The SL 55 AMG has two poly-V-belts (belt
one shown in purple/belt two shown in
black).
1Idler pulley
2Automatic belt tensioner
3ABC tandem pump (pump for
power-steering assistance and ABC
chassis)
4Air conditioning compressor
5Crankshaft
6Coolant pump
7Generator (alternator)
8Idler pulley
9Automatic belt tensioner
aSupercharger
SL 600, SL 65 AMG
1Automatic belt tensioner
2ABC tandem pump (pump for
power-steering assistance and ABC
chassis)
3Air conditioning compressor
4Crankshaft
5Coolant pump
6Generator (alternator)
7Idler pulley
8Idler pulley
9Idler pulley

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