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REPAIR MAINTENANCE OPERATION OF MOTOR VEHICLES
Mercedes-Benz C-Class (W203, 2000 issue)

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Mercedes-Benz W203
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Mercedes-Benz
W203
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Cooling and heating



Separate characteristics are resulted also in the text of the Head and in case of compulsion of their performance are highlighted in bold.

Design

Thermosyphon vane water pump. Thermostatic adjustment. With a separate expansion tank. Fan power is turned on and off by the control unit

Coolant: mixture of water and antifreeze (1: 1) in a formulation is provided frost to -37 ? C

Antifreeze

03 MB ? Q1 0002 or Glysantin Protect Plus / G482

The volume of the system by replacing l

  • Gasoline engines with the designation 111
8.5
  • Gasoline engines with the designation 271
7.5
  • Gasoline engines with the designation 112
10.5
  • Diesel engines with the designation 611
11.9
  • Diesel engines with the designation of 6212
12.4
Composition coolant

The share of antifreeze in the coolant to ensure frost

to -37 ? C

50%

to -45 ? C

55%

System pressure

About 1.2 atm. (the exact amount is shown on the cover of the expansion tank). The cover should withstand the pressure for two minutes.

Thermostat

The valve stroke

at least 8 mm

Gasoline engines

  • Start of opening
87 ? 2 ? C
  • Full opening
102 ?

Diesel engines

  • Start of opening
92 ? ? 2 ? C
  • Full opening
102 ?

Switch fan

Enable / Disable 1st stage

92-97 / 84-91 ? C

Turn on / off the 2nd stage

99-105 / 91-98 ? C

Cork expansion tank

Overpressure valve opens atm.

Stage 1

1.4 ? 0.1

Stage 2

2.0 ? 0.1

Vacuum valve opens

0.1

On the cover of the valve opening pressure is shown in bar. x 100. If, for example, on the cover is "140/200", we are talking about a two-step the cover and the valve opening pressure of 1.4 and 2.0 atm.

Refrigerant

Type

R134a (do not use R12)

Volume m.

750

Refrigerator oil

Type

A001 989 0803

Volume in cm 3

120

Efforts of a tightening of carving connections, Nanometer

Fastener tightening torques are given in the text of the Head and on some graphics *.

* Highlighted text in bold torques are subject to exact observance; no bold efforts resulted only roughly.

Tube Coolant cylinder block

  • Gasoline engines 111
40
  • Gasoline engines 112
12
  • Diesel engines
thirty

Bolts of fastening of the water pump

4-cylinder petrol engines

  • Bolt M6
10
  • Bolt M8
25

6-cylinder petrol engines

  • Bolt M6
14
  • Bolt M8
35 (under the new housing allocation mechanism 10Nm and 25 Nm respectively)

Damper Belt

  • a tensioning device
25
  • a coolant pump
35

Diesel engines

  • Bolt M6
14
  • Bolt M8
20

Pulley to the coolant pump

35




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