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Display messages
Possible causes/consequences and MM Solutions
ActiveActive BrakeBrake AssistAssist
FunctionsFunctions CurrentlyCurrently
Limited See Opera‐Limited See Opera‐
tor's Manualtor's Manual
Active Brake Assist is temporarily inoperative.
Possible causes are:
R
the radar sensor system is temporarily inoperative, e.g. due to elec-
tromagnetic radiation emitted by nearby TV or radio stations or
other sources of electromagnetic radiation
R
the system is outside the operating temperature range
R
the on-board voltage is too low
When the causes stated above no longer apply, the display message
disappears.
Active Brake Assist is operational again.
If the display message does not disappear:
X
Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
X
Secure the vehicle against rolling away (Y page 152).
X
Restart the engine.
ActiveActive BrakeBrake AssistAssist
Functions LimitedFunctions Limited
See Operator's Man‐See Operator's Man‐
ualual
Active Brake Assist is unavailable due to a malfunction. Adaptive
Brake Assist may also have failed.
X
Visit a qualified specialist workshop immediately.
PRE-SAFE Inopera‐PRE-SAFE Inopera‐
tivetive SeeSee Operator'sOperator's
ManualManual
Important functions of PRE-SAFE
®
have failed. All other occupant
safety systems, e.g. air bags, remain available.
X
Visit a qualified specialist workshop immediately.
ActiveActive BrakeBrake AssistAssist
FunctionsFunctions CurrentlyCurrently
Limited See Opera‐Limited See Opera‐
tor's Manualtor's Manual
Active Brake Assist with cross-traffic function is temporarily inopera-
tive.
Possible causes are:
R
function is impaired due to heavy rain or snow
R
the radar sensor system is temporarily inoperative, e.g. due to elec-
tromagnetic radiation emitted by nearby TV or radio stations or
other sources of electromagnetic radiation
R
the system is outside the operating temperature range
R
the on-board voltage is too low
R
Mercedes-AMG vehicles: ESP
®
is deactivated
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:
X
Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
X
Secure the vehicle against rolling away (Y page 152).
X
Restart the engine.
X
Mercedes-AMG vehicles: switch ESP
®
on again (Y page 70).
234
Display messages
On-board computer and displays
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