Page 248 of 273
245 Technical data
Te ch n ica l
data Instruments
and controlsOperation DrivingInstrument
cluster displayPractical hints Car care Index Layout of poly-V-belt drive
SLK 230 Kompressor
routing, belt I
The engine is equipped with two poly-V-belts.
1Crankshaft
2Air conditioner compressor
3Power steering pump
4Coolant pumpSLK 230 Kompressor
routing, belt II
For dimensions of the poly-V-belts, see page 248.
5Idler pulley
6Generator (alternator)
7Idler pulley
8Idler pulley
9Supercharger
P13.20-2007-26
9
6
8
7
4
1
5
32
5
32
9
6
8
4
1
7
P13.20-2008-26
Page 249 of 273
246 Technical data
Te ch n ica l
data Instruments
and controlsOperation DrivingInstrument
cluster displayPractical hints Car care Index
SLK 230 Kompressor
routing combined, belts I and II1Crankshaft
2Air conditioner compressor
3Power steering pump
4Coolant pump
5Idler pulley
6Generator (alternator)
7Idler pulley
8Idler pulley
9Supercharger
9
6
8
7
4
1
5
32P13.20-2009-26
Page 250 of 273
247 Technical data
Te ch n ica l
data Instruments
and controlsOperation DrivingInstrument
cluster displayPractical hints Car care Index SLK 320
belt routing1Automatic belt tensioner
2Crankshaft
3Air conditioner compressor
4Generator (alternator)
5Idler pulley
6Power steering pump
7Coolant pump
For dimensions of the poly-V-belt, see page 248.
6
5
1
2
3
7
4
Page 256 of 273
253 Fuels, coolants, lubricants etc. - capacities
Te ch n ica l
data Instruments
and controlsOperation DrivingInstrument
cluster displayPractical hints Car care Index Windshield / Headlamp
washer systemapprox. 7.4 US qt (7.0 l) MB Windshield washer
concentrate “S”
1
Fuel tank including
a reserve ofapprox. 15.8 US gal (60.0 l)
approx. 2.1 US gal (8.0 l)Premium unleaded gasoline:
Posted Octane 91 (Avg. of 96 RON / 86 MON)
Air conditioner system R-134a refrigerant and special PAC lubricant
(Never R-12)1 Use MB Windshield Washer Concentrate “S” and water for temperatures above freezing or MB Windshield Washer Concentrate “S” and
commercially available premixed windshield washer solvent / antifreeze for temperatures below freezing. Follow suggested mixing ratios, see
page 195.
Model Capacity Fuels, coolants, lubricants etc.
Page 257 of 273

254 Fuels, coolants, lubricants etc. - capacities
Te ch n ica l
data Instruments
and controlsOperation DrivingInstrument
cluster displayPractical hints Car care Index
Engine oils
Engine oils are specifically tested for their suitability in
our engines. Therefore, use only engine oils
recommended by Mercedes-Benz. Information on
recommended brands is available at your authorized
Mercedes-Benz Center.
Please follow Service Booklet recommendations for
scheduled oil changes. Failure to do so could result in
engine damage not covered by the Mercedes-Benz
Limited Warranty.
Engine oil additives
Do not blend oil additives with engine oil. They may be
harmful to the engine operation.
Damage or malfunctions resulting from blending oil
additives are not covered by the Mercedes-Benz Limited
War ra nt y.Air conditioner refrigerant
R-134a (H FC) ref rigerant a nd special PAG l ubricating oil
is used in the air conditioner system.
Never use R-12 (CFC) or mineral-based lubricating oil,
otherwise damage to the system will occur.
Brake fluid
During vehicle operation, the boiling point of the brake
fluid is continuously reduced through the absorption of
moisture from the atmosphere. Under extremely hard
operating conditions, this moisture content can lead to
the formation of bubbles in the system thus reducing
the system‘s efficiency.
The brake fluid must therefore be replaced every two
years, preferably in the spring.
It is recommended to use only brake fluid approved by
Mercedes-Benz. Your authorized Mercedes-Benz Center
will provide you with additional information.
Page 263 of 273

260 Index
Te ch n ica l
data Instruments
and controlsOperation DrivingInstrument
cluster displayPractical hints Car careIndex
Index
A
ABS (Antilock brake system) ....................................... 168
Malfunction indicator lamp ..................................... 182
Adjusting telescoping steering column ........................ 63
Air conditioner refrigerant ...........................................254
Air pump ......................................................................... 196
Airbag deactivation system ............................................ 50
AIRBAG OFF indicator lamp ........................................ 185
Airbags .............................................................................. 52
Alarm system ............................................................. 35, 37
Antenna ...........................................................................232
Anticorrosion / antifreeze .................. 161, 194, 252, 256
Antilock brake system (ABS) ....................................... 168
Malfunction indicator lamp ..................................... 182
Antitheft alarm system ................................................... 35
Aquaplaning ................................................................... 158
Ashtrays ...........................................................................114
Audio system .................................................................... 91
Anti-theft system ........................................................ 93
Button and soft key operation ................................... 94
Cassette mode ............................................................. 99
CD changer ................................................................ 103CD mode ..................................................................... 102
Operating and display elements ...............................92
Operating safety .......................................................... 91
Operation – audio and telephone ............................. 91
Radio mode .................................................................. 97
Telephone operation .................................................106
Automatic central locking .............................................. 31
Automatic transmission ................................................144
Emergency Operation ............................................... 152
Fluid level ................................................................... 192
Program mode selector switch ................................ 151
Selector lever positions ............................................147
Transmission selector lever,
manually unlocking ............................................. 217
BBabySmart
TM airbag deactivation system ..................... 50
Self-test ......................................................................... 51
BAS (Brake assist system) ............................................ 166
Malfunction indicator lamp ..................................... 181
Battery ............................................................................. 210
Charge indicator lamp .............................................. 184
Recycling .................................................................... 211
Block heater .................................................................... 162
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