High-Voltage Battery - SMART fortwo coupé Maintenance Booklet

Operating safety
4
Always have maintenance work on drive sys-
tem and high-voltage system electronics
and components performed by a qualified
specialist. We recommend that you use a
smart service partner which is qualified
for smart electric drive for this purpose.
If you have any questions about carrying
out any type of service, turn to the advice
of an authorized electric drive smart
center.
! Always have maintenance work on drive
system and high-voltage system elec-
tronics and components, such as control
modules, sensors and connecting cables,
performed by a qualified specialist
workshop with the necessary expert
knowledge of electric drive vehicles and
the tools to carry out the work required,
e.g. at an authorized electric drive
smart center. Otherwise there is a danger
that vehicle components may wear more
rapidly, which may void the vehicle's
warranty.
High-voltage disconnect device
The vehicle is equipped with a high-volt-
age disconnect device : to disable the
vehicle's high-voltage system.
! The high-voltage system must only be
switched off at vehicle standstill by
specially trained service engineers.
Otherwise the high-voltage system may
be damaged.
G
WARNING

High-voltage battery

The high‑voltage battery is located under
the vehicle's underbody.
Heavy blows against the vehicle underbody,
for example when running over an obstacle,
may cause serious damage and impair the
operating safety of your vehicle. If you
suspect that damage to your vehicle has
occurred, you should turn on your hazard
warning flashers, carefully slow down, and
drive with caution to an area which is a
safe distance from the road.
Inspect the vehicle underbody for possible
damage. If the vehicle appears unsafe, have
it towed to the nearest authorized electric
drive smart center or other maintenance or
repair facility that is qualified to work on
smart electric vehicles for further inspec-
tion or repairs.
G
WARNING
If the housing of the high-voltage battery
has been damaged, electrolyte and gases
may leak out. These are poisonous and caus-
tic. There is a risk of injury.
Avoid contact with skin, eyes or clothing.
Immediately rinse electrolyte splashes off
with water and seek medical attention
straight away.
When the pressure inside the high‑voltage
battery exceeds a certain value, for exam-
ple in case of a vehicle fire, flammable gas
will escape through a ventilation valve on
the vehicle's underbody. This prevents the
high‑voltage battery from exploding.
G
WARNING
In the event of a vehicle fire, the internal
pressure of the high-voltage battery can
exceed a critical value. In this case flam-
mable gas escapes through a ventilation
valve on the underbody. The gas can ignite.
There is a risk of injury.
Please make sure you read the technical documentation, such
as the Operator's Manual and workshop information, before
carrying out any maintenance work.