Checking and correcting coolant level - ra83001400526x(0526)
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
CAPACITIES
| without rear air conditioner | with rear air conditioner | |
|---|---|---|
| Refrigerant R12 | 1300 g | 1500 g |
| Refrigerant R134a | 1200 g | 1400 g |
- Clean sight glass (arrow) on receiver.
- Disconnect plug from refrigerant temperature sensor for air conditioning (B10/8) and bridge plug from temperature sensor (B10/8).
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Arrangement of temperature sensor B10/8 6-cylinder engine
- Allow engine to idle, switch on automatic climate control (DEF).
- Observe sight glass and simultaneously remove bridge plug from refrigerant temperature sensor for air conditioning (B10/8).
Arrangement of temperature sensor B10/8 8-cylinder engine
The refrigerant must rise shortly after switching on the electromagnetic charge and then flow without any bubbles (i.e. coolant no longer visible).
NOTE:
It is not possible to check the capacity exactly at the sight glass. At higher ambient temperatures (>35°C) some bubbles may appear even with the correct capacity.
Arrangement of temperature sensor B10/8 12-cylinder engine
In the event of refrigerant loss or suspected leaks in the system, the correct capacity is only ensured after completely emptying (recycling) and refilling the system, after checking the system for leaks. A correct capacity can only be achieved by weighing the refrigerant or by the use of a filling cylinder or automatic air conditioner filling equipment.
Note the latest information concerning correct capacity