Note: Individual characteristics are also given in the text of the Chapter and, if their implementation is mandatory, are highlighted in bold.
Design
Thermosiphon with a vane water pump. Thermostatic control. With a separate expansion tank. Electric fan, switched on and off by a two-stage thermal switch.
| Antifreeze type | MB № Q1 03 0002 |
| System volume, l | See Chapter Routine maintenance |
| Coolant composition: | |
| The proportion of antifreeze in the coolant to ensure frost resistance | |
| up to -37°C 50% | |
| up to -45°C 55% | |
The pressure in the system is about 1.2 bar (the exact value is indicated on the expansion tank cap). The lid should withstand pressure for two minutes.
Thermostat
| Valve stroke, mm | not less than 7 |
| Valve activation temperatures | |
| Petrol engines | |
| Start of opening | 78-82° |
| Full disclosure | 94° |
| Diesel engines | Data not provided |
| Fan thermal switch | |
| Switching on/off 1st stage | 92-97/84-91°C |
| Switching on/off 2nd stage | 99-105/91-98°C |
Air conditioner
Air conditioner refrigerant
| Type | R134a (do not use R12) |
| Volume, g. | |
| With rear K/V | |
| by VIN A1 128373 | 1400 |
| with VIN A1 128374 | 1250 |
| Without rear K/V | |
| by VIN 1A 128373 | 1200 |
| with VIN 1A 128374 | 1150 |
Refrigerator oil
| Type | PAG |
| Volume, cm³ | 160 |
Tightening force of threaded connections, Nm
Tightening torques for fasteners are also given in the text of the Chapter and in some illustrations*.
* Tightening torques highlighted in bold in the text must be strictly observed; efforts not shown in bold are only approximate.