Refueling
MOBILITY
Refueling
Vehicle features and options
Tank vent
This chapter describes all standard, country-spe‐
cific and optional features offered with the series.
It also describes features and functions that are
not necessarily available in your vehicle, e.g., due
to the selected options or country versions. This
also applies to safety-related functions and sys‐
tems. When using these functions and systems,
the applicable laws and regulations must be ob‐
served.
Concept
The vehicle is equipped with a special fuel tank.
The fuel tank is designed for special require‐
ments that arise from operation with the Range
Extender.
General information
Excess pressure may build up in the fuel tank as
a result of gasoline vapors; this pressure is dissi‐
pated before the fuel cap is opened.
General information
Overview
The button is located on the driver's floor area.
Follow the fuel recommendation, refer to
page 222, prior to refueling.
A sufficient amount of fuel must be added to op‐
erate the Range Extender. When the Range Ex‐
tender is activated, the current charge state is
maintained. The vehicle has a greater range.
Venting the tank
1. Switch off drive-ready state.
Do not refuel unless the engine is at a standstill
and the selector lever is in position P/N, other‐
wise the buildup of pressure may cause the fuel
nozzle to shut off prematurely.
2.
Press the button to start the pressure
equalization.
The tank venting status is displayed in the in‐
strument cluster. In rare cases, tank venting
can last several minutes.
When tank venting has finished, a message is
displayed in the instrument cluster. The fuel
filler flap is released for opening.
Safety information
3. Open the fuel filler flap.
NOTICE
If it is not possible to open the fuel filler flap
after tank venting, press the button again.
With a driving distance of less than
30 miles/50 km the engine may no longer have
sufficient fuel. Engine functions are not en‐
sured anymore. There is a risk of damage to
property, among other potential damage. Re‐
fuel promptly.
If it is still not possible to open the fuel filler
flap even after pressing the button again, un‐
lock the fuel filler flap manually, refer to
page 220.
219
English 