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ENVIRONMENTAL NOTE Environmental
pollution due to disposal in a non-envi‐
ronmentally-friendly manner
#
Dispose of the water/fuel mixture in an
environmentally-friendly manner.
OM642
OM651 front wheel drive
OM651 rear wheel drive
#
Park the vehicle in a safe location and secure
it against rolling away.
#
Switch off the auxiliary heating (
#
Switch off the engine.
#
Open the bonnet (
#
Place a suitable collector beneath drain hose
2
.
#
Switch on the ignition.
#
Open drain screw
1
until the water/fuel
mixture emerges from drain hose
2
.
#
Close drain screw
1
as soon as around
0.2 litre of the water/fuel mixture has been
collected.
After 30 seconds, the electrical fuel pump
automatically stops the discharge of the
water/fuel mixture.
#
After draining, switch off the ignition.
#
Dispose of the collected water/fuel mixture
in an environmentally friendly manner, e.g. at
a qualified specialist workshop.
#
Check that drain screw
1
has been closed.
If the engine is running while drain screw
1
is open, you will lose fuel through drain hose
2
.
#
Close the bonnet (
#
!
The indicator lamp does not go out
after draining: drain the fuel filter again.
#
!
The indicator lamp does not go out
after the second draining: consult a quali‐
fied specialist workshop.
Mercedes-Benz recommends that you have the
fuel filter drained at a qualified specialist work‐
shop.
Maintenance and care
277