Note. Separate characteristics are also given in the text of the Chapter and, if they are mandatory, are highlighted in bold.
Design
Thermosyphon with a vane water pump. Thermostatic adjustment. With separate expansion tank. Electrically driven fan, switched on and off by a two-stage thermal switch.
Type of antifreeze | MB № Q1 03 0002 |
System volume, l | see chapter Current service |
The composition of the coolant: | |
The proportion of antifreeze in the coolant to ensure frost resistance | |
up to -37°С 50% | |
up to -45°С 55% |
System pressure japprox. 1.2 bar (the exact value is indicated on the cap of the expansion tank). The lid must withstand pressure for two minutes.
Thermostat
Valve stroke, mm | at least 7 |
Valve activation temperatures | |
Gasoline engines | |
Start of opening | 78-82° |
Full opening | 94° |
Diesel engines | Data not provided |
Fan thermal switch | |
1st stage on/off | 92-97/84-91°C |
2nd stage on/off | 99-105/91-98°С |
Air conditioner
Air conditioner refrigerant
Type | R134a (do not use R12) |
Volume, g. | |
With rear K/V | |
according to VIN A1 128373 | 1400 |
with VIN A1 128374 | 1250 |
Without rear K/V | |
according to VIN 1A 128373 | 1200 |
with VIN 1A 128374 | 1150 |
Refrigerator oil
Type | PAG |
Volume, cm3 | 160 |
Tightening force of threaded connections, Nm
Fastener tightening torques are also given in the text of the Chapter and in some illustrations *.
* The tightening torques shown in bold type must be strictly adhered to; Efforts not in bold type are indicative only.