ging. Deposits may also form on the fuel injec-
tor. This may reduce the engine output.
Unburned fuel can get into the oil pan. This
causes the engine oil level to rise. This can
cause engine mechanical damage.
Observe the following points to avoid damage
and reducing the engine output:
#
Fill up with fuels with bio-diesel content
of 5% (ULSD) or less, whenever possible.
#
Regularly check your engine oil level if
you use B20 fuels on a regular basis.
#
Strictly follow the oil change intervals
quoted in the instrument cluster and
within your Maintenance Booklet.
#
Use only engine oils and lters approved
for use in your vehicle.
#
If you do not plan to drive your vehicle for
several weeks, completely ll the fuel
tank in advance with ULSD fuel.
For more information, consult the gas station sta .
The identi cation of fuels with bio-diesel content
(ULSD or B20) must be clear. If the identi cation is
not clear, do not refuel. Do not refuel with any
fuels that have not been approved for your vehicle.
TTank cont
ank content and r
ent and reserv
eserve fuel
e fuel
The total capacity of the fuel tank may vary,
depending on the vehicle equipment.
TTank cont
ank content and r
ent and reserv
eserve fuel
e fuel
Gasoline engine
Tot
Gasoline engine
Total capacity
al capacity
M274
Approx. 22.5 gal
(85 liters)
Diesel engine
Tot
Diesel engine
Total capacity
al capacity
OM642
OM651
Approx. 24.5 gal
(93 liters)
Gasoline engine
Gasoline engine
Of whic
Of which r
h reserv
eserve fuel
e fuel
Models with approx.
22.5 gal (85 l) total
capacity
Approx. 5 gal
(19 liters)
Diesel engine
Diesel engine
Of whic
Of which r
h reserv
eserve fuel
e fuel
Models with approx.
24.5 gal (93 l) total
capacity
Approx. 5 gal
(19 liters)
DEF
DEF
NNoottes on DEF
es on DEF
Observe the notes on operating uids
(
/
page 268).
DEF is a water-soluble uid for the exhaust gas
a ertreatment of diesel engines.
*
NO
NOTE
TE Irritation to skin, eyes and respira-
tory tract due to DEF
DEF can cause irritation if inhaled or ingested,
or if it comes in contact with eyes or skin.
When the tank is open, ammonia vapor can
escape.
#
Do not inhale or ingest DEF.
#
Make sure DEF does not come into con-
tact with your skin, eyes or clothing.
#
Keep DEF away from children.
#
Only ll the DEF tank in well-ventilated
areas.
If a person comes into contact with DEF,
observe the following:
R
If you have ingested DEF, drink plenty of
water and seek medical attention immedi-
ately.
R
If DEF has come into contact with your
eyes, rinse them for 15 minutes, also
beneath the eyelids.
R
Immediately rinse DEF o your skin with
soap and water.
*
NNOOTE
TE Damage caused by additives in DEF
or by diluting DEF
The DEF exhaust gas a ertreatment system
could be destroyed by the following:
R
Additives in DEF
R
Diluting DEF
#
Only use DEF in accordance with ISO
22241.
#
Do not mix additives.
#
Do not dilute DEF.
Technical data 271
271