223 Operation
Engine compartment
1Cap
2COLD LEVEL mark
The coolant level should reach the COLD
LEVEL mark2 in the reservoir.
Using a rag, turn the cap slowly approx-
imately one half turn to the left to re-
lease any excess pressure.
Continue turning the cap to the left and
remove it.
Add coolant as required.
Replace and tighten cap.
More information on coolant can be found
in the “Technical data” section
(
page 304).
Battery
The battery is located in the engine com-
partment.
The battery should always be sufficiently
charged in order to achieve its rated ser-
vice life. Refer to Service Booklet for bat-
tery maintenance intervals.
If you use your vehicle mostly for
short-distance trips, you will need to have
the battery charge checked more frequent-
ly.When replacing batteries, always use bat-
teries approved by Mercedes-Benz.
If you do not intend to operate your vehicle
for an extended period of time, consult an
authorized Mercedes-Benz Light Truck
Center about steps you need to observe.
iIf the engine is already at its regular op-
erating temperature, the coolant may
be approximately 0.6 in (1.5 cm) above
the COLD LEVEL mark.
G
Observe all safety instructions
and precautions when handling
automotive batteries.
A
Risk of explosion
D
Keep flames or sparks away
from battery. Do not smoke.
B
Battery acid is caustic. Do not
allow it to come into contact
with skin, eyes or clothing.
In case it does, immediately
flush affected area with clear
water and seek medical help if
necessary.
2
Drain the coolant
Engine 611.960/961/962,
612.961/962/967/990, 613.960/961,
628.960/961/963, 646, 647, 648
AR20.00-P-1142HB
Engine 612.963
AR20.00-P-1142M
3
Remove coolant thermostat (20)
Engine 611, 612, 613, 646, 647, 648
AR20.10-P-2460PP
Engine 628.960/963
AR20.10-P-2460M
4
Mount the housing to remove oil and flush the
cooling/heating system
The housing may be used only for the
purpose of removing the oil, and must be
removed again after it has been rinsed.
Engine 611.960/961/962/ 612.961/962
/963/967/990, 613.960/961
*BA20.10-P-1005-01A
Engine 628.960/961/962/963
*BA20.10-P-1002-01F
Engine 646.962/963
*BA20.10-P-1002-01G
y
Housing for removing oil and flushing the
cooling/heating system
WF58.50-P-2000-01A
Cleaning
5
Set the heater control to full power
6
Set the auxiliary heater to full power
7
Fill the cooling/heating system with a rinsing
solution
Rinsing solution consisting of 5% cleaning
agent and 95% water.
*BF20.00-P-1001-02E
Cleaning agent
*BR00.45-Z-1001-04A
8
Warm up the engine to operating temperature
at moderate engine speed
While engine is running, hold operating
temperature at 80 °C for about 5 min.
9
Switch off engine and allow the cooling
system to
cool to about 50 °C
10
Drain the rinsing solution completely at the
drain plug of radiator (18)
Observe the environmental instructions of
the manufacturer of the cleaning agent.
11
Fill cooling system with fresh water
Pour fresh water into the coolant
expansion reservoir (1).
12
Warm up the engine to operating temperature
at moderate engine speed
While engine is running, hold the
operating temperature at 80 °C for about
5 min.
13
Drain the fresh water completely at the drain
plug of radiator (18)
Repeat the flushing process until all of the
rinsing solution has been removed.
14
Install in the reverse order
Coolant pump, coolant thermostat
Number
Designation
Engine
611.960/
961
Engine
611.962
Engine
612.961/
963
Engine
612.962/
967/990
BA20.10-P-1005-01A
Bolt of coolant thermostat housing to cylinder head
Nm
9999
Designation
Engine
613.960/
961
BA20.10-P-1005-01A
Bolt of coolant thermostat housing to cylinder head
Nm
9
Designation
Engine
628.960/961/962/
963
Copyright DaimlerChrysler AG 12.05.2006 CD-Ausgabe G/10/04 . This WIS print-out will not be recorde
d by Modification services.
Page 2
