Bleeding coolant circuit with auxiliary heater - ra83001401165x(1165)

WARNING: This page does not describe the selected car, but rather 42 other vehicles, including the 1999 Mercedes-Benz S600, 1999 Mercedes-Benz S500, 1999 Mercedes-Benz S420, 1999 Mercedes-Benz S320, and 1999 Mercedes-Benz CL600. However, it is still accessible from the selected car via links, so may be relevant.

Model 140

Previous work:

Front right fender lining removed

Operation number of operation texts and work units or standard texts and flat rates:

Fig 1: Identifying Sealing Cap, Tank, Knurled Screw And Expansion Tank

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Temperature selectors	Move to "Max" position.
Sealing cap (1) on coolant expansion tank (2)	Turn to 1st lock and vent pressure, then turn further to 2nd lock and remove cap.
	The sealing cap must only be opened when the coolant temperature is below 90°C.
Coolant	Slowly fill up to edge (3) of coolant expansion tank (2).
	Only use coolants and mixture ratios approved by the vehicle manufacturer (refer to note).
Knurled screw (4)	Unscrew from coolant hose (5), wait until coolant emerges from opening free from bubbles (collect coolant in container), screw in.
Coolant	Slowly fill up to edge (3) of coolant expansion tank (2).
Engine	Start and allow to warm up (coolant temperature above 70°C).
Auxiliary heater	Switch on; then switch off after approx. 2 minutes.
Engine	Switch off.
Coolant	Slowly fill up to edge (3) of coolant expansion tank (2).
Sealing cap (1)	Screw on.

NOTE: To guarantee protection against corrosion, the coolant must contain at least 40 % anticorrosion/antifreeze agent. This corresponds to an antifreeze protection down to -25°C.

Do not exceed a percentage of 55 % (antifreeze protection down to approx. -45°C), otherwise heat dissipation deteriorates.