Page 184 of 317

181 Driving instructions
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cluster displayPractical hints Car care Index Winter driving
Have your vehicle winterized at your authorized 
Mercedes-Benz Light Truck Center before the onset of 
winter.
•Change the engine oil if the engine contains an oil 
which is not approved for winter operation. For 
viscosity (SAE / CCMC class) and filling quantity, 
see page 292.
•Check engine coolant anticorrosion / antifreeze 
concentration.
•Additive for the windshield washer and headlamp 
cleaning system: Add MB Concentrate “S” to a 
premixed windshield washer solvent / antifreeze 
which is formulated for below freezing temperatures 
see page 237.
•Test battery: Battery capacity drops with decreasing 
ambient temperature. A well charged battery helps 
to ensure that the engine can be started, even at low 
ambient temperatures.
•Tires: We recommend M+S rated radial-ply tires on 
all four wheels for the winter season. Observe 
permissible maximum speed for M+S rated 
radial-ply tires and the legal speed limit.In winter operation, the maximum effectiveness of the 
antilock brake system (ABS), the four wheel electronic 
traction system (4-ETS+), the electronic stability 
program (ESP), and electronic brake proportioning 
(EBP) can only be achieved with M+S rated radial-ply 
tires and / or snow chains recommended by 
Mercedes-Benz. Snow chains maximize performance.
For driving instructions using snow chains see 
page 179.
Deep water
Caution!
Do not drive through flooded areas or water of unknown 
depth. Before driving through water, determine its 
depth. It should not be deeper than approximately 
20 inches (50 cm).
If you must drive through deep water, drive slowly to 
prevent water from entering the engine compartment or 
passenger compartment, being ingested by the air 
intake, possibly causing damage to electrical 
components or wiring, to engine or transmission that is 
not covered by the Mercedes-Benz Limited Warranty. 
     
        
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184 Driving instructions
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Checklist before off-road driving
•Tires: Check the tread depth and maintain specified 
tire pressure (see tire pressure label inside the fuel 
filler flap). Check tires for possible damage and 
remove foreign objects. The valve caps must be 
mounted.
•Rims: Dented or bent rims can cause tire pressure 
loss and damage the tire beads. For this reason 
change rims before driving off-road.
• Vehicle tool kit: Check if the vehicle jack is 
functional. In all cases take the vehicle tool kit, a 
strong tow rope, a shovel and a small plank (to put 
under the vehicle jack on sandy soil) with you.Driving in steep terrain
Slope angle:
126° (ML 320 and ML 430)
23° (ML 55 AMG)
226° (ML 320 and ML 430)
21° (ML 55 AMG)
Switch to LOW RANGE mode before starting to drive up 
or down steep inclines, see page 209.
Maximum vehicle climbing ability is a 60% grade.
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        Page 237 of 317

234 Engine compartment
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Automatic transmission fluid level
The transmission has a permanent fill of automatic 
transmission fluid.
Regular automatic transmission fluid level checks and 
changes are not required. For this reason the dipstick is 
omitted.
If you notice fluid leaks or gear shifting malfunctions, 
have your authorized Mercedes-Benz Light Truck Center 
check the transmission fluid level.
Engine oil consumption
Engine oil consumption checks should only be made 
after the break-in period. During the break-in period, 
higher oil consumption may be noticed and is normal. 
Frequent driving at high engine speeds results in 
increased consumption.Coolant level
To check the coolant level, the vehicle must be parked 
on level ground and the engine stopped.
Check coolant level only when coolant is cold.
The coolant level should reach the COLD LEVEL mark in 
the reservoir.P20.30-0241-20 
     
        
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294 Fuels, coolants, lubricants etc.
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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 Light Truck 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 (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 Light 
Truck Center will provide you with additional 
information.