Qr Code For Rescue Card; Data Storage - Mercedes-Benz A-Class Owner's Manual

your vehicle as well as on possible vehi‐
cle damage.

QR code for rescue card

The QR code is secured in the fuel filler flap and
on the opposite side on the B-pillar. In the event
of an accident, rescue services can use the QR
code to quickly find the appropriate rescue card
for your vehicle. The current rescue card con‐
tains the most important information about your
vehicle in a compact form, e.g. the routing of the
electric lines.
Further information can be obtained at http://
www.mercedes-benz.de/qr-code.

Data storage

Electronic control units
Electronic control units are fitted in your vehicle.
Some of these are necessary for the safe opera‐
tion of your vehicle, while some assist you when
driving (driver assistance systems). In addition,
your vehicle provides comfort and entertainment
functions, which are also made possible by elec‐
tronic control units.
Electronic control units contain data memories
which can temporarily or permanently store
technical information about the vehicle's operat‐
ing state, component loads, maintenance
requirements and technical events or faults.
In general, this information documents the state
of a component part, a module, a system or the
surroundings such as:
operating states of system components (e.g.
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fluid levels, battery status, tyre pressure)
status messages concerning the vehicle or
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its individual components (e.g. number of
wheel revolutions/speed, deceleration in
movement, lateral acceleration, display of
fastened seat belts)
malfunctions or defects in important system
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components (e.g. lights, brakes)
information on events leading to vehicle
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damage
system reactions in special driving situations
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(e.g. airbag deployment, intervention of sta‐
bility control systems)
General notes
ambient conditions (e.g. temperature, rain
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sensor)
In addition to providing the actual control unit
function, this data assists the manufacturer in
detecting and rectifying faults and optimising
vehicle functions. The majority of this data is
temporary and is only processed in the vehicle
itself. Only a small portion of the data is stored
in the event or fault memory.
When your vehicle is serviced, technical data
from the vehicle can be read out by service net‐
work employees (e.g. workshops, manufactur‐
ers) or third parties (e.g. breakdown services).
Services include repair services, maintenance
processes, warranty cases and quality assurance
measures, for example. The read out is per‐
formed via the legally prescribed port for the
diagnostics connection in the vehicle. The
respective service network locations or third
parties collect, process and use the data. They
document technical statuses of the vehicle,
assist in finding faults and improving quality and
are transmitted to the manufacturer, if neces‐
sary. Furthermore, the manufacturer is subject
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