Page 227 of 330
224 Check regularly and before a long trip
Technical
data Instruments 
and controlsOperationDrivingInstrument 
cluster displayPractical hints Car care Index
Check regularly and before a long trip 1Engine oil level
See “Engine oil level, checking” on page 114 and 
page 253.
2Coolant level
See “Coolant level” on page 254.
3Brake fluid
See “Brake fluid” on page 307.
4Windshield washer system
Headlamp cleaning system
For refilling reservoir see page 256.
Opening hood, see page 251.
Ve h i c l e   l i g h t i n g : Check function and cleanliness. For 
replacement of light bulbs, see “Exterior lamps” on 
page 275.
Exterior lamps switch, see page 116.
Mercedes-Benz
Mercedes-Benz
4
2
1
3
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254 Engine compartment
Technical
data Instruments 
and controlsOperation DrivingInstrument 
cluster displayPractical hintsCar care Index
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 Center check the 
transmission fluid level.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 black top part of the 
reservoir.
P20.30-2032-26
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255 Engine compartment
Technical
data Instruments 
and controlsOperation DrivingInstrument 
cluster displayPractical hintsCar care Index Adding coolant
If coolant has to be added, a 50/50 mixture of water and 
MB anticorrosion / antifreeze should be added.
The drain plugs for the cooling system are located on 
the right side of the engine block and at the bottom of 
the radiator.
Anticorrosion / antifreeze mixture, see page 310.
Wa r n i n g !
In order to avoid possible serious burns or injury:
• Use extreme caution when opening the hood if 
there are any signs of steam or coolant leaking 
from the cooling system, or if the coolant 
temperature gauge indicates that the coolant is 
overheated.
• Do not remove pressure cap on coolant 
reservoir if engine temperature is above 194
°F 
(90
°C). Allow engine to cool down before 
removing cap. The coolant reservoir contains 
hot fluid and is under pressure.
• Using a rag, slowly open cap approximately 
1/2 turn to relieve excess pressure. If opened 
immediately, scalding hot fluid and steam will 
be blown out under pressure.• Do not spill antifreeze on hot engine parts. 
Antifreeze contains ethylene glycol which may 
burn if it comes into contact with hot engine 
parts.
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