Mercedes-Benz C-Class 2018 Operator's Manual page 239

Display messages
Active Brake Assist
Functions Limited
See Operator's Man‐
ual
PRE-SAFE Inopera‐
tive See Operator's
Manual
Active Brake Assist
Functions Currently
Limited See Opera‐
tor's Manual
Active Brake Assist
Functions Limited
See Operator's Man‐
ual
Possible causes/consequences and M Solutions
Active Brake Assist is unavailable due to a malfunction. Adaptive
Brake Assist may also have failed.
Visit a qualified specialist workshop immediately.
X
Important functions of PRE-SAFE
safety systems, e.g. air bags, remain available.
Visit a qualified specialist workshop immediately.
X
Active Brake Assist with cross-traffic function is temporarily inopera-
tive.
Possible causes are:
Function is impaired due to heavy rain or snow.
R
The radar sensor system is temporarily inoperative, e.g. due to
R
electromagnetic radiation emitted by nearby TV or radio stations or
other sources of electromagnetic radiation.
Mercedes-AMG vehicles: ESP
R
The system is outside the operating temperature range.
R
The on-board voltage is too low.
R
When the causes stated above no longer apply, the display message
disappears.
Active Brake Assist with cross-traffic function is operational again.
If the display message does not disappear:
Pull over and stop the vehicle safely as soon as possible, paying
X
attention to road and traffic conditions.
Secure the vehicle against rolling away (
X
Restart the engine.
X
Mercedes-AMG vehicles: switch ESP
X
Active Brake Assist with cross-traffic function is unavailable due to a
malfunction.
Visit a qualified specialist workshop immediately.
X
Display messages
®
have failed. All other occupant
®
is deactivated
page 161).
Y
®
on again ( page 71).
Y
237
Z