Driving and parking, Refueling – Mercedes-Benz GL-Class 2014 Owners Manual User Manual

Page 188

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DEF (BlueTEC vehicles only)

Important notes on use

To function properly, BlueTEC exhaust gas

aftertreatment must be operated with the

reducing agent DEF. Adding DEF is one of the

tasks performed during maintenance. Under

normal operating conditions, a tank of DEF

lasts until the next service due date.
When the supply of DEF is almost used up,

the

Check Additive See Operator's

Check Additive See Operator's

Manual

Manual

message is shown in the

multifunction display.
If you drive the vehicle faster than 10 mph

(16 km/h), the

Check Additive See

Check Additive See

Operator's

Operator's Manual

Manual

message goes out after

approximately one minute.
When the supply of DEF is down to a reserve

of approximately 1 gal (3.8 l) the

Refill

Refill

AdBlue/DEF See Operator's Manual

AdBlue/DEF See Operator's Manual

message is shown in the multifunction

display.
When the DEF supply drops to a minimum, the

Remaining Starts: 16

Remaining Starts: 16

message is shown

in the multifunction display.
If the

Refill AdBlue/DEF No Start in

Refill AdBlue/DEF No Start in

XXXX km

XXXX km

message is shown in the

multifunction display, you can still drive the

vehicle over the distance shown. If DEF is not

refilled, you will subsequently be unable to

start the engine. If the

Refill AdBlue/

Refill AdBlue/

DEF Eng. Start Not Poss

DEF Eng. Start Not Poss

message

appears in the multifunction display and the

engine does not start, you must add DEF.

X

Add at least 1 gal (3.8 l) of DEF.

X

Switch on the ignition for at least 60

seconds.

X

Start the engine.

i

Have the DEF tank refilled at a qualified

specialist workshop.

Use the special DEF refill bottle when adding

DEF between maintenance intervals. Contact

an authorized Mercedes-Benz Center with

any questions or, if necessary, contact

Roadside Assistance (

Y

page 25).

If the outside temperature is below 12 ‡

(Ò11 †) it may be difficult to top up. If DEF is

frozen and there is an active warning

indicator, it may not be possible to add DEF.

Park the vehicle in a warmer place, e.g. in a

garage, until DEF has become fluid again. It

will then be possible to add DEF again.

Alternatively, have the DEF tank refilled at a

qualified specialist workshop.
Further information about BlueTEC exhaust

gas aftertreatment and DEF is available at any

authorized Mercedes-Benz Center.

Important safety notes on the refilling

procedure

DEF is a water-soluble fluid for the exhaust

gas aftertreatment of diesel engines. It is:

R

not poisonous

R

colorless and odorless

R

not flammable

When you open the DEF container, small

amounts of ammonia vapor may be released.
Ammonia vapors have a pungent odor and are

particularly irritating to the skin, to mucous

membranes and to the eyes. You may

experience a burning sensation in your eyes,

nose and throat. Coughing and watering of

the eyes are possible.
Do not inhale ammonia vapors. Fill the DEF

tank only in well-ventilated areas.
DEF must not come into contact with your

skin, eyes or clothing and must not be

swallowed. Keep DEF away from children.
If you or other persons come into contact with

DEF, observe the following:

R

Rinse DEF from your skin immediately with

soap and water.

R

If DEF comes into contact with your eyes,

immediately rinse them thoroughly with

clean water. Seek medical assistance

without delay.

R

If DEF has been swallowed, rinse your

mouth out immediately. Drink plenty of

186

Refueling

Driving

and

parking

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