391 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 -22°F (-30°C) and corro-
sion protection.
If the antifreeze mixture is effective to
-22°F (-30°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 in the boil-over
protection. Refer to Service Booklet for re-
placement interval.Coolant system design and coolant used
stipulate the replacement interval. The re-
placement interval published in the
Service Booklet is only applicable if
MB 325.0 anticorrosion/antifreeze solu-
tion or other Mercedes-Benz approved
products of equal specification (see Facto-
ry Approved Service Products pamphlet)
are used to renew the coolant concentra-
tion or bring it back up to the proper level.
To provide important corrosion protection,
the solution must be at least 45% anticor-
rosion/antifreeze (equivalent to freeze
protection to approx. - 22°F [-30°C]). If
you use a solution that is more than 55%
anticorrosion/antifreeze (freeze protec-
tion to approx. - 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 anticorrosion/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 instruc-
tions.
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-
sult an authorized Mercedes-Benz Center.
410 IndexEngine oil 255, 388
Adding 257
Additives 388
Checking level 255
Consumption 255
Display messages 307
Filler neck 257
Messages in display 256
Engine oil level see Oil level
ESP 75, 78, 398
Control switch 26
Switching off 79
Switching on 80
Synchronizing 295
Warning lamp 78
ESP/ABS warning lamp 23
ETD see Emergency Tensioning Device
Express-close front side windows 182
Express-open front side windows 182F
Fahrenheit
Setting temperature units 140
Fastening the seat belts 40
Fine adjustment
Cruise control 195
First aid kit 323
Flat tire 339
Spare wheel 350
TIREFIT kit 340, 345
Flexible Service System (FSS) 271
Fluid level 258
Fog lamp, rear 120, 332
Replacing bulb 335
Fog lamps, front 120
Replacing bulbs 332
Front airbags 64
Front lamps 332
Replacing bulbs 334
FSS (Flexible Service System) 271, 399Fuel 250
Additives 390
Fuel reserve warning lamp 23, 287
Gasoline additives 390
Premium unleaded gasoline 251,
387, 389
Requirements 389
Fuel consumption statistics
After start 150
Since reset 151
Fuel filler flap 250
Locking 250
Opening 250
Unlocking 250
Fuel requirements 389
Fuel reserve tank
Message in display 309
Fuel tank
Filler flap 250
Fuels, coolants, lubricants etc. -
capacities 386
Functions (control system) 128
