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Problems with fuel and the fuel tank
Problem
Possible causes/consequences and MM Solutions
Fuel is leaking from the
vehicle.
G
WARNING
The fuel line or the fuel tank is faulty.
Risk of explosion or fire.
X
Apply the electric parking brake.
X
Switch off the engine.
X
Remove the SmartKey from the ignition lock.
or, in vehicles with KEYLESS-GO start-function or KEYLESS‑GO
X
Open the driver's door.
The vehicle electronics are now in key position u. This is the same
as the SmartKey having been removed.
X
Do not restart the engine under any circumstances.
X
Consult a qualified specialist workshop.
The engine does not
start.
The fuel tank of a vehicle with a diesel engine has been run completely
dry.
X
Refuel the vehicle with at least 5.3 US qt (5 liters) of diesel.
X
Turn the ignition on for approximately ten seconds (Y page 135).
X
Start the engine continuously for up to ten seconds until it runs
smoothly.
If the engine does not start:
X
Turn the ignition on again for approximately ten seconds
(Y page 135).
X
Start the engine again continuously for up to ten seconds until it
runs smoothly.
If the engine does not start after three attempts:
X
Consult a qualified specialist workshop.
The fuel filler flap cannot
be opened.
The fuel filler flap is not unlocked.
X
Unlock the vehicle (Y page 77).
The SmartKey battery is discharged or nearly discharged.
X
Unlock the vehicle using the mechanical key (Y page 79).
The fuel filler flap is unlocked, but the opening mechanism is jammed.
X
Consult a qualified specialist workshop.
DEF (BlueTEC vehicles only)
General notes
To function properly, BlueTEC exhaust gas after-
treatment must be operated with the reducing
agent DEF. Adding DEF is one of the tasks per-
formed during maintenance.
When the supply of DEF is almost used up, the
Check Additive See Operator's ManualCheck Additive See Operator's Manual
message is shown in the multifunction display.
If you drive the vehicle faster than 10 mph
(16 km/h), the Check Additive See Opera‐Check Additive See Opera‐
tor's Manualtor's Manual message goes out after approx-
imately one minute.
Refueling
153
Driving and parking
Z
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