Mercedes-Benz 2012 A Class - Manual (Page 238)

Display messages Possible causes/consequences and M Solutions
J
Brake immediately
Vehicles with manual transmission: a malfunction has occurred
while the HOLD function was activated.
A tone may also sound at regular intervals. If you attempt to lock
the vehicle, the tone becomes louder.
You cannot start the engine.
X Paying attention to the traffic situation, immediately depress the
brake pedal firmly and hold until the display message disap-
pears.
X Secure the vehicle against rolling away ( Y page 162).
You can restart the engine.
J
Check brake fluid
level
There is insufficient brake fluid in the brake fluid reservoir.
In addition, the red J warning lamp lights up in the instrument
cluster and a warning tone sounds.
G
WARNING
The braking efficiency may be impaired.
There is a risk of an accident.
X Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions. Do not continue driving
under any circumstances.
X Secure the vehicle against rolling away ( Y page 162).
X Consult a qualified specialist workshop.
X Do not top up the brake fluid. This does not correct the fault.
#
Check brake pad
wear
The brake pads/linings have reached their wear limit.
X Visit a qualified specialist workshop.
PRE-SAFE
inoperative See
Owner's Manual
Important functions of PRE-SAFE ® have failed. All other occupant
safety systems, e.g. airbags, remain available.
X Visit a qualified specialist workshop immediately.
236
Display messages
On-board computer and displays