Procedure
1.
Turn off the engine.
2.
Open bonnet.
3.
Twist the coolant filler cap half a turn to
release the overpressure.
4.
Switch on the heater.
5.
Place a suitable collection container
underneath the engine.
6.
Remove drain hose (A) from bracket and
point downwards.
7.
Remove screw (arrow) and allow coolant to
drain out.
NOTE:
Dispose of drained coolant in accordance
with the appropriate regulations.
8.
Drive in screw (arrow).
Fig. 32
9.
Secure hose (A) again in the bracket.
2.6.4 Clean the cooling/heating system internally
Preliminary conditions
• Coolant drained
Clean the cooling system
Procedure
1.
Fill the cooling system with hot cleaning solution (e.g. "P3").
NOTE:
Only perform cleaning if the coolant is very dirty with rust or grease.
2.
Start the engine and run for approximately one hour filled with the flushing fluid.
2. Service and maintenance
40 Maintenance
530.020.020.011 Rev.A
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