2015 MERCEDES-BENZ B-CLASS HATCHBACK battery capacity

Drive system
Display messages
Possible causes/consequences and
M
MSolutions +
Top up coolant See Top up coolant See
Owner's Manual Owner's Manual The coolant level is too low.
! Avoid making long journeys with too little coolant in the cooling
system. The drive system will otherwise be damaged.
X If the coolant needs topping up more often than usual, have the
cooling system checked at a qualified specialist workshop. #
See Owner's Manual See Owner's Manual The 12 V battery is no longer being charged.
X Stop the vehicle immediately, paying attention to road and traffic
conditions, and switch off the drive system.
X Secure the vehicle against rolling away (Y page 145).
X Do not drive on.
X Do not tow the vehicle.
X Consult a qualified specialist workshop. #
Stop vehicle See Stop vehicle See
Owner's Manual Owner's Manual The 12 V battery is no longer being charged and the battery charge
level is too low.
A warning tone also sounds.
X Stop the vehicle immediately, paying attention to road and traffic
conditions, and switch off the drive system.
X Secure the vehicle against rolling away (Y page 145).
X Do not drive on.
X Do not tow the vehicle.
X Consult a qualified specialist workshop. High-voltage battery
Display messages
Possible causes/consequences and
M MSolutions Ý
Battery reserve Battery reserve
level level The charge level of the high-voltage battery has dropped into the
reserve range.
When the remaining range is 0 km, the message appears again. The
power available is then continuously reduced. The reduction in power
is represented in the E-CELL display (Y page 173).
X Charge the high-voltage battery. Û
Battery capacity Battery capacity
too too
low
lowStop
Stop Charge
Charge
immediately
immediately A warning tone also sounds. The E
‑CELL display (Ypage 173) and the
charge level display (Y page 174) go down to 0. The charge level of the
high-voltage battery is so low that operation is no longer possible. The drive system cannot be restarted.
If you then try to restart the drive system, the Battery capacity
Battery capacity
too low Stop Charge immediately too low Stop Charge immediately message appears.
X Park the vehicle and charge the high-voltage battery. 204
Display
messagesOn-board computer and displays

The drive system can be started using another vehicle.
R Only use batteries with an equal nominal voltage (12 volts).
R Make sure that the battery of the donor vehicle does not have a significantly lower capacity than
the discharged battery.
R Use jump leads with a sufficient cross-section and insulated terminal clamps from a qualified
specialist workshop, e.g. a Mercedes-Benz Service Centre.
R Make sure that the two vehicles do not touch.
R Route the jump leads so that they cannot be caught by rotating components in the engine com-
partment.
R Do not disconnect the discharged battery from the vehicle's electrical system. X
Switch off the engine of both vehicles.
X Shift the transmission to position P.
X Switch off all electrical consumers.
X Remove battery cover :.
X Connect positive terminal ;on the vehicle with the flat battery to positive terminal =of the
donor vehicle using the red jump lead. Begin with the flat battery.
X Connect negative terminal ?of the donor vehicle to negative terminal Aof the vehicle with the
flat battery using the black jump lead. Begin with donor vehicle's battery B.
X Start the engine of the donor vehicle and run it at idling speed.
X Switch on the ignition in the vehicle with the flat battery.
X If the drive system cannot be activated immediately, wait for approximately 60 seconds between
starting attempts.
If the drive system does not start, call a breakdown service.
i Jump-starting cables and further information regarding jump starting can be obtained at any
qualified specialist workshop. Jump-starting
259Breakdown assistance Z

must be positioned vertically, directly under
the jacking point of the vehicle.
! Position a suitable jack correctly on the
intended jacking points. If you fail to position the jack correctly, the vehicle may be dam-
aged.
The jacking points for the jack are recesses in
the lower door sill. They can only be seen from
underneath. There is one located behind each
of the front wheel arches and in front of the
rear wheel arches.
Position the jack in the jacking points so that
when viewed from the side, the jack is in the
vertical position.
! Position a suitable jack only on the jacking
points intended for this purpose.
Never position the jack on the high-voltage
battery. Do not jack up the vehicle on the
high-voltage battery. There is otherwise a risk of damaging the high-voltage battery.
Also observe the notes in the "Changing a
wheel" section.
Observe the following when raising the vehi- cle:
R to raise the vehicle, only use the vehicle-spe-
cific jack that has been tested and approved
by Mercedes-Benz. If the jack is used incor-
rectly, it could tip over while the vehicle is
raised.
R the jack is designed only to raise and hold the
vehicle for a short time while a wheel is being
changed. It is not permissible to use it to per- form maintenance work under the vehicle.
R avoid changing the wheel on uphill and down-
hill slopes.
R before raising the vehicle, safeguard it from
rolling away by applying the parking brake and
positioning wheel chocks. Do not release the parking brake while the vehicle is raised.
R the jack must be placed on a firm, flat and
non-slip surface. On a loose surface, a large,
flat load-bearing underlay must be used. On a
slippery surface, a non-slip underlay must be
used, e.g. rubber mats.
R do not use wooden blocks or similar objects
as a jack underlay. Otherwise, the jack will not
be able to achieve its load-bearing capacity
due to the restricted height. R
make sure that the distance between the
underside of the tyres and the ground does
not exceed 3 cm.
R never place your hands or feet under the
raised vehicle.
R do not lie under the vehicle.
R do not start the drive system when the vehicle
is raised.
R do not open or close a door or the tailgate
while the vehicle is raised.
R make sure that no persons are present in the
vehicle when the vehicle is raised. X
Using wheel wrench :, loosen the bolts on
the wheel you wish to change by about one
full turn. Do not unscrew the bolts completely. Jacking points
The jacking points are located just behind the
front wheel arches and just in front of the rear
wheel arches (arrows). Changing a wheel
275Wheels and tyres Z