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W116 (1972-1980, petrol) W126 (1979-1991, petrol) W140 (1991-1998) W220 (1998-2005)
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  • Coolant Replacement — General Notes

Coolant Replacement — General Notes (Mercedes-Benz S-Class W140)

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Note: See also Section Checking the functioning of the cooling system and frost resistance of the coolant, replacing the liquid in the Chapter Routine maintenance


Caution! Avoid contact of antifreeze with exposed areas of the body and painted surfaces of the vehicle.


Any accidental splashes should be washed off immediately with plenty of water.

Remember that antifreeze is a highly toxic liquid and its ingestion into the body, even in small quantities, can have the most serious consequences, including death.

Never leave antifreeze stored in a loosely closed container; immediately collect any coolant spilled on the floor.

Remember that the sweet smell of antifreeze can attract the attention of children and animals.

Consult with your local authorities about methods of disposal of used coolant - in many regions of the world there are special collection points for various types of waste.

Never pour old coolant down the drain or onto the ground!

Warning! Drained coolant must not be reused. Coolant is toxic and must not be disposed of with household waste.


Warning! Drained coolant must not be reused. Coolant is toxic and must not be disposed of with…


The coolant level switch is located at the bottom of the expansion tank on the right side of the engine compartment



The coolant must be replaced when the cooling system is repaired, in which the liquid is drained. In the event that the cylinder head, cylinder block, cylinder head gasket, radiator, heat exchanger or engine are replaced during repair, the coolant must be replaced with new one. During the circulation process, anti-corrosion additives are deposited on new light metal parts and thus form a durable anti-corrosion layer. The anti-corrosion additive in the used coolant is usually not sufficient to form a sufficient protective layer on new parts.

Descriptions of fluid replacement procedures are provided in Chapter Routine maintenance.
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The article has been verified: Polyakov Zakhar Grigorievich
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S-Class W140 / Cooling system
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Antifreeze is a means of protection against freezing
Cooling and Heating System Specifications
Cooling and Heating Systems — General Information
Removal and replacing cooling system hoses
Checking the proper functioning of the thermostat
Removal and installation the thermostat
Removal and installation the cooling system radiator
Removal and installation the water pump
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W220 (1998-2005) 
  • General information
  • Introduction to guide
  • User manual
  • Maintenance
  • Power unit
  • Engine repair
  • Cooling and heating systems
  • Power and exhaust systems
  • Ignition and control system
  • Charge and launch systems
  • Transmission
  • Automatic gearbox
  • Drive shafts
  • Chassis
  • Brake system
  • Front suspension
  • Rear suspension
  • Steering
  • Body
  • Body elements
  • Electrical equipment
  • Equipment and devices
  • Electrical circuits
W140 (1991-1998) 
  • User manual
  • Controls and instruments
  • Driving and operation
  • Maintenance
  • Power unit
  • Petrol engine V6
  • Petrol engine V8
  • Petrol engine V12
  • Diesel engine OM603
  • Diesel engine OM606
  • Cooling system
  • Power supply and injection system
  • Control system HFM-SFI
  • Control system LH-SFI
  • Control systems ME-SFI
  • Diesel control system
  • Ignition system
  • Charge and launch system
  • Transmission
  • Mechanical gearbox 717.438
  • Mechanical gearbox 717.454
  • Automatic gearbox 722.5
  • Automatic gearbox 722.6
  • Clutch and drive shafts
  • Differential
  • Chassis
  • Brake system
  • Steering
  • Front suspension
  • Rear suspension
  • Body
  • Exterior (external elements)
  • Interior (internal elements)
  • Electrical equipment
  • Equipment and devices
  • Electrical circuits
W126 (1979-1991, petrol) 
  • Power unit
  • Engine repair
  • Ignition system
  • Lubrication system
  • Cooling system
  • Fuel system
  • Fuel injection system
  • Transmission
  • Clutch and cardan
  • Mechanical gearbox
  • Automatic gearbox
  • Chassis
  • Front suspension
  • Rear suspension
  • Steering
  • Brake system
  • Electrical equipment
  • Power devices
  • Electrical circuits
W116 (1972-1980, petrol) 
  • General information
  • Introduction to guide
  • Power unit
  • 8-cylinder V8 engine
  • 6-cylinder I6 engine
  • Cooling and lubrication system
  • Power system (carburetor)
  • Fuel injection system
  • Ignition system
  • Transmission
  • Clutch and cardan
  • Car gearbox
  • Chassis
  • Front suspension
  • Rear suspension
  • Steering
  • Brake system
  • Electrical equipment
  • Power devices
  • Electrical circuits
 
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