Page 374 of 473

373 Practical hints
What to do if …
When the message Add 1 qt. (Canada:
1 liter) engine oil when next
refueling
(SLK 55 AMG) or Check oil
level when next refueling
(SLK 280,
SLK 350) appears while the engine is run-
ning and at operating temperature, the en-
gine oil level has dropped to approximately
the minimum level.
When this occurs, the warning will first
come on intermittently and then stay on if
the oil level drops further.Visually check for oil leaks. If no obvious oil
leaks are noted, drive to the nearest
service station where the engine oil should
be topped to the required level with an
approved engine oil. For information on
approved engine oils, refer to the Factory
Approved Service Products pamphlet
(USA only) or contact an authorized
Mercedes-Benz Center.
Display symbolDisplay messagePossible cause/consequencePossible solution
NEngine oil level
Reduce oil levelSLK 55 AMG only:
You have added too much engine
oil. There is a risk of damaging the
engine or the catalytic converter.Have oil siphoned or drained off.
Observe all legal requirements with respect
to its disposal.
Engine oil level
Stop, turn engine offThere is no oil in the engine. There
is a danger of engine damage.Stop the vehicle in a safe location or as soon
as it is safe to do so.
Turn off the engine.
Apply the parking brake (page 59).
Add engine oil (page 299) and check the
engine oil level (
page 296).
!The engine oil level warnings should not be
ignored. Extended driving with the symbol
displayed could result in serious engine damage
that is not covered by the Mercedes-Benz
Limited Warranty.
Page 445 of 473

444 Technical data
Fuels, coolants, lubricants, etc.
ModelCapacityFuels, coolants, lubricants etc.
Power steeringAll models1.1 US qt (1.0 l)MB Power Steering Fluid (Pentosin CHF 11S or,
depending on vehicle production date, Chevron
Texaco PSF 9109)
1
Front wheel hubsAll modelsapprox. 2.1oz (60g) eachHigh temperature roller bearing grease
Brake systemAll models0.5 US qt (0.5 l)MB Brake Fluid (DOT 4+)
Cooling systemSLK 280approx. 10.4 US qt (9.8 l)MB 325.0 Anticorrosion/Antifreeze Agent
SLK 350approx. 10.4 US qt (9.8 l)
SLK 55 AMGapprox. 11.7 US qt (11.1 l)
Fuel tankAll modelsapprox. 18.5 US gal (70.0 l)Premium unleaded gasoline:
Minimum posted Octane 91 (average of
96 RON/86 MON)
including a reserve ofSLK 280, SLK 350
SLK 55 AMGapprox. 2.4 US gal (9.0 l)
approx. 2.6 US gal (10.0 l)
Air conditioning systemAll modelsR-134a refrigerant and special PAG lubricant oil
(never R-12)
Hydraulic system for
retractable hardtopAll models0.19 US qt (0.18 l)MB Hydraulic Fluid
Windshield washer
system and headlamp
cleaning system*All models7.4 US qt (7.0 l)MB Windshield washer concentrate2
1For detailed information, please refer to the Factory Approved Service Products pamphlet (USA only) or contact an authorized Mercedes-Benz Center.2Use MB Windshield Washer Concentrate“MB SummerFit” and water for temperatures above freezing point or MB Windshield Washer Concentrate “MB SummerFit”
and commercially available premixed windshield washer solvent/antifreeze for temperatures below freezing point. Follow suggested mixing ratios (page 450).
Page 449 of 473

448 Technical data
Fuels, coolants, lubricants, etc.
Coolants
The engine coolant is a mixture of water
and anticorrosion/antifreeze, which pro-
vides:
Corrosion protection
Freeze protection
Boiling protection (by increasing the
boiling point)
The cooling system was filled at the factory
with a coolant providing freeze protection
to approximately -35°F (-37°C) and corro-
sion protection.
If the antifreeze mixture is effective to
-35°F (-37°C), the boiling point of the cool-
ant in the pressurized cooling system is
reached at approximately 266°F (130°C).The coolant solution must be used year
round to provide the necessary corrosion
protection and increase boil-over protec-
tion. Refer to Maintenance Booklet for
replacement interval.
Coolant system design and coolant used
determine the replacement interval. The
replacement interval published in the
Maintenance Booklet is only applicable if
MB 325.0 Anticorrosion/Antifreeze solu-
tion or other Mercedes-Benz approved
products of equal specification are used to
renew the coolant concentration or bring it
back up to the proper level.
For information on other Mercedes-Benz
approved products of equal specification,
refer to the Factory Approved Service
Products pamphlet (USA only) or contact
an authorized Mercedes-Benz Center.To provide important corrosion protection,
the solution must be at least
50% anticorrosion/antifreeze (equivalent
to freeze protection to approximately
-35°F [-37°C]). If you use a solution that is
more than 55% anticorrosion/antifreeze
(freeze protection to approximately
-49°F [-45°C]), the engine temperature
will increase due to the lower heat transfer
capability of the solution. Therefore, do not
use more than this amount of anticorro-
sion/antifreeze.
If the coolant level is low, water and
MB 325.0 Anticorrosion/Antifreeze
should be used to bring it up to the proper
level (have cooling system checked for
signs of leakage). Please make sure the
mixture is in accordance with label
instructions.
The water in the cooling system must meet
minimum requirements, which are usually
satisfied by normal drinking water. If you
are not sure about the water quality, con-
tact an authorized Mercedes-Benz Center.
!Add premixed coolant solution only. Adding
water and MB 325.0 Anticorrosion/Antifreeze
separately from each other, could cause engine
damage not covered by the Mercedes-Benz
Limited Warranty.
Page 456 of 473

455 Index
Delayed shut-off
Exterior lamps 144
Interior lighting 145
Department of Transportation see DOT
Difficulties
Wile driving 58
With starting the engine 52
Digital speedometer 128
Dimensions, Vehicle 441
Dipstick see Oil dipstick
Direction of rotation (Tires) 307
Display text see Messages in the
multifunction display
Displays
Digital speedometer 128
Maintenance service indicator 334
Multifunction display 121
Outside temperature 128
Symbol messages 366
Text messages 358
Vehicle status message memory 135
Vehicle status messages 356Distance to empty (range), Trip
computer 149
Door
Control panel 34
Entry lamps 117
Locking in an emergency 388
Locking/unlocking, SmartKey 94
Opening from inside 99
Remote door unlock, Tele Aid* 269
Unlocking in an emergency 387
DOT 328
Drink holder see Cup holder
Drinking and driving 279
Driver’s air bag see Air bagsDriving 53
Abroad 287
Accelerator position 159
Automatic transmission* 53
Driving off 282
Fuel saving 279
Hydroplaning 284
In winter 286
Instructions 48, 279
Kickdown 159
Manual transmission 53
Standing water 287
Tires 283
Driving safety systems 84
ABS 84
BAS 86
Electronic traction system 88
ESP
®86
Driving systems
Cruise control 247
Driving tips 159
Page 462 of 473

461 Index
N
Navigation system* 135
Neck-level heating see AIRSCARF*
Neutral gear position
Automatic transmission* 155, 157
Manual transmission 154
Night security illumination (Control
system) 144
Normal occupant weight 329
Number, Vehicle Identification (VIN) 430
O
Occupant Classification System see OCS
Occupant distribution 329
Occupant safety 64
Passenger front air bag off indicator
lamp 74
OCS 71
Seat belts 48, 68
SRS 64OCS 71
Self-test 75
Oil see Engine oil
One-touch gearshifting
Gear selector lever 162
Steering wheel gearshift
control* 163
Operating safety 16, 193
Operating vehicle outside the USA and
Canada 13
Operator’s Manual 10
Ornamental moldings see Vehicle care
Outside temperature indicator 119, 128
Outside temperature/speed 140
Overhead control panel 31
Overspeed range 119P
Paintwork code 430
Paintwork see Vehicle care
Panic alarm 83
Parcel net (Storage compartment) 253
Parking 59, 282
Parking brake 53, 59
Parking lamps 109, 394
Parts service 428
PASS AIR BAG OFF indicator lamp see Pas-
senger front air bag off indicator lamp
Passenger air bag see Air bags
Passenger compartment 287
Passenger front air bag
Messages in the multifunction
display 361–364
Passenger front air bag off indicator
lamp 74, 354
Passenger safety see Occupant safety