2001 MERCEDES-BENZ CLK320 engine

298 Technical data
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3VIN, visible (lower edge of windshield)
4Engine number
5Body number and paintwork number
6Emission control label
7Information label, California version
Vacuum line routing for emission control systemLayout of poly-V-belt drive
1Automatic belt tensioner
2Crankshaft
3Air conditioner compressor
4Coolant pump
5Generator (alternator)
6Idler pulley
7Power steering pump
6
5
7
3
4

299 Technical data
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Model CLK 320 (208.365)
1
Engine112
Mode of operation 4-stroke engine, gasoline injection
No. of cylinders 6
Bore 3.54 in (89.90 mm)
Stroke 3.30 in (84.00 mm)
Total piston displacement 195.2 cu.in. (3199 cm
3)
Compression ratio 10:1
Output acc. to SAE J 1349 215 hp/5700 rpm
(160 kW/5700 rpm)
Maximum torque acc. to SAE J 1349 232 ft.lb/3000 rpm
(315 Nm/3000 rpm)
Maximum engine speed 6000 rpm
Firing order 1-4-3-6-2-5
Poly-V-belt 2390 mm
1 The 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.

302 Fuels, coolants, lubricants etc. - capacities
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Fuels, coolants, lubricants etc. – capacities
Vehicle components and their respective lubricants must match. Therefore use only brands tested and recommended
by us. Please refer to the Factory Approved Service Products pamphlet, or inquire at your Mercedes-Benz Center.
Capacity Fuels, coolants, lubricants etc.
Engine with oil filter 8.5 US qt (8.0 l) Recommended engine oils
Automatic transmission 8.5 US qt (8.0 l) Automatic transmission fluid
Rear axle 1.4 US qt (1.3 l) Hypoid gear oil SAE 90, 85 W 90
Power steering approx. 1.1 US qt (1.0 l) MB Power steering fluid
Front wheel hubs approx. 2.1 oz (60 g) each High temperature roller bearing grease
Brake system approx. 0.5 US qt (0.5 l) MB Brake fluid (DOT 4)
Windshield/headlamp
washer systemapprox. 7.4 US qt (7.0 l) MB Windshield washer concentrate “S” 1
Cooling system approx. 9.5 US qt (9.0 l) MB Anticorrosion/antifreeze
Fuel tank including
a reserve ofapprox. 16.4 US gal (62.0 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
Windshield/headlamp washer system on page 254.

303 Fuels, coolants, lubricants etc.
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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.
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.Air conditioner refrigerant
R-134a (HFC) refrigerant and special PAG lubricating 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.

304 Fuels, coolants, lubricants etc.
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Premium unleaded gasoline
Caution!
To maintain the engine’s durability and performance,
premium unleaded gasoline must be used. If premium
unleaded is not available and low octane fuel is used,
follow these precautions:
•have the fuel tank filled only partially with unleaded
regular and fill up with premium unleaded as soon
as possible,
•avoid full throttle driving and abrupt acceleration,
•do not exceed an engine speed of 3000 rpm, if the
vehicle is loaded with a light load such as two
persons and no luggage,
•do not exceed 2/3 of maximum accelerator pedal
position, if the vehicle is fully loaded or operating in
mountainous terrain.Fuel requirements
Use only Premium unleaded meeting ASTM
standard D 439:
The octane number (posted at the pump) must be
91 min. It is an average of both the Research (R) octane
number and the Motor (M) octane number: (R+M)/2).
This is also known as ANTI-KNOCK INDEX.
Unleaded gasoline containing oxygenates such as
Ethanol, IPA, IBA and TBA can be used provided the
ratio of any one of these oxygenates to gasoline does not
exceed 10%, MTBE not to exceed 15%.
The ratio of Methanol to gasoline must not exceed 3%
plus additional cosolvents.
Using mixtures of Ethanol and Methanol is not allowed.
Gasohol, which contains 10% Ethanol and 90% unleaded
gasoline, can be used.
These blends must also meet all other fuel requirements
such as resistance to spark knock, boiling range, vapor
pressure etc..

305 Fuels, coolants, lubricants etc.
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A major concern among engine manufacturers is carbon
build up caused by gasoline. Mercedes-Benz
recommends the use of only quality gasoline containing
additives that prevent the build up of carbon deposits.
After an extended period of using fuels without such
additives, carbon deposits can build up especially on the
intake valves and in the combustion area, leading to
engine performance problems such as:
•warm-up hesitation,
•unstable idle,
•knocking/pinging,
•misfire,
•power loss.
Do not blend other specific fuel additives with fuel.
They only result in unnecessary cost, and may be
harmful to the engine operation.
Damage or malfunctions resulting from poor fuel
quality or from blending specific fuel additives are not
covered by the Mercedes-Benz Limited Warranty.Coolants
The engine coolant is a mixture of water and
anticorrosion/antifreeze, which provides:
•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
-22°F (-30°C) and corrosion protection.
If the antifreeze mixture is effective to -22°F (-30°C), the
boiling point of the coolant 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 in the
boil-over protection. You should have it replaced every
3years.
To provide the important corrosion protection, the
solution must be at least 45% anticorrosion/antifreeze
(equals a freeze protection to approx. - 22°F [-30°C]). If
you use a solution that is more than 55% anticorrosion/
antifreeze (freeze protection to approx. - 49°F [-45°C]),

306 Fuels, coolants, lubricants etc.
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the engine temperature will increase due to the lower
heat transfer capability of the solution. Therefore, do not
use more than this amount of anticorrosion/antifreeze.
If the coolant level is low, water and MB anticorrosion/
antifreeze should be used to bring it up to the proper
level (have cooling system checked for signs of leakage).
The water in the cooling system must meet minimum
requirements, which are usually satisfied by normal
drinking water. If your are not sure about the water
quality, consult your authorized Mercedes-Benz Center.
Anticorrosion/antifreeze
Your vehicle contains a number of aluminum parts. The
use of aluminum components in motor vehicle engines
necessitates that anticorrosion/antifreeze coolant used
in such engines be specifically formulated to protect the
aluminum parts. (Failure to use such anticorrosion/
antifreeze coolant will result in a significantly
shortened service life.)Therefore the following product is strongly
recommended for use in your vehicle: Mercedes-Benz
Anticorrosion/antifreeze agent.
Before the start of the winter season (or once a year in
the hot southern regions), you should have the
anticorrosion/antifreeze concentration checked. The
coolant is also regularly checked each time you bring
your vehicle to your authorized Mercedes-Benz Center
for service.
Anticorrosion/antifreeze quantity
Approx. freeze protection
– 35°F
(– 37°C)– 49°F
(– 45°C)
4.8 US qt
(4.5 l)5.3 US qt
(5.0 l)

310 Index
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Basic setting .............................................................. 122
Defogging windows .................................................. 123
Defrosting ................................................................... 123
Display and controls ................................................. 122
Dust filter ................................................................... 126
Economy ..................................................................... 123
Rear window defroster ............................................. 124
Residual engine heat utilization (REST) ............... 125
Special settings ......................................................... 123
Automatic transmission ............................................... 191
Emergency Operation .............................................. 199
Fluid level ...................................................................252
Program mode selector switch ............................... 198
Selector lever position .............................................. 194
Transmission selector lever,
manually unlocking .............................................272
BBabySmart
TM airbag deactivation system ..................... 64
Self-test ......................................................................... 64
Backrest, front seat .......................................................... 53
BAS (Brake assist system) ............................................ 213
Malfunction indicator lamp .....................................229Battery ............................................................................ 266
Battery recycling ...................................................... 267
BATTERY/ALTERNATOR - malfunction
and warning messages ............................................ 233
Block heater ................................................................... 209
BRAKE ASSIST - malfunction
and warning messages ............................................ 234
Brake assist system (BAS) ............................................ 213
Malfunction indicator lamp .................................... 229
Brake fluid ....................................................202, 302, 303
Capacity ..................................................................... 302
BRAKE FLUID - malfunction
and warning messages ............................................ 235
BRAKE LINING WEAR - malfunction
and warning messages ............................................ 235
Brake pad wear .............................................................. 235
Brake warning lamp ..................................................... 227
Brake fluid low ......................................................... 227
Brakes .................................................... 200, 202, 213, 217
CCapacities
Fuels, coolants, lubricants etc. .............................. 302
Cargo area ....................................................................... 159
Loading instructions ................................................. 160