LI54.70-P-068094

Message (yellow) in IC "Active Brake Assist
currently restricted, see operator's manual"
Topic number
LI54.70-P-068094
Version
5
Function group
54.70 - Proximity warning system
Date
3/29/21
Validity
118 167 177 205 facelift 247 253 facelift
Reason for change
Damage code adapted
Complaint
Active Brake Assist functional scope currently restricted
- see owner's manual.
Note:
The ABA control unit (A108 - Active Brake Assist (ABA)) may contain one of the following DTCs
- C163691
- C174AFB
- C174AFA
Cause
Transport or production mode is active and/or ABA sensor engagement monitor active.
Remedy
Deactivate transport mode and drive vehicle for approx 6mi.
The DTC then switches to passive and the sensor can be calibrated.
If the radar sensor is not correctly mounted, a PTSS case should be created with picture documentation.
Symptoms
Communication/information > Information display > Displays > Multifunction display > Multifunction display, error
messages > Pre-Safe Inoperative
Communication/information > Assistance and warning systems > Brake Assist > Warning message in instrument
cluster
Communication/information > Assistance and warning systems > Brake Assist > Malfunction
Control unit/fault code
Control unit
Fault text
A108 / A108/1 - Active Brake Assist / Active Distance As- C174AFB - The calibration of control unit 'Aktiver Bremssist DISTRONIC (ABA / DTR)
Assistent / Aktiver Abstands-Assistent DISTRONIC' has a
malfunction. _
29.03.2021 19:44:59
© Copyright Mercedes-Benz AG
EDWMARK
Page 1 / 4
C174AFA - The calibration of control unit 'Aktiver BremsAssistent / Aktiver Abstands-Assistent DISTRONIC' has a
malfunction. _
C163691 - The calibration of control unit 'Aktiver BremsAssistent / Aktiver Abstands-Assistent DISTRONIC' has
a malfunction. The parameter is outside the permissible
range.
A108 / A108/1 - Active Brake Assist / Active Distance As- C174AFB - The calibration of control unit 'Aktiver Bremssist DISTRONIC (ABA / DTR)
Assistent / Aktiver Abstands-Assistent DISTRONIC' has a
malfunction. _
C174AFA - The calibration of control unit 'Aktiver BremsAssistent / Aktiver Abstands-Assistent DISTRONIC' has a
malfunction. _
C163691 - The calibration of control unit 'Aktiver BremsAssistent / Aktiver Abstands-Assistent DISTRONIC' has
a malfunction. The parameter is outside the permissible
range.
A108 / A108/1 - Active Brake Assist / Active Distance As- C174AFB - The calibration of control unit 'Aktiver Bremssist DISTRONIC (ABA / DTR)
Assistent / Aktiver Abstands-Assistent DISTRONIC' has a
malfunction. _
C174AFA - The calibration of control unit 'Aktiver BremsAssistent / Aktiver Abstands-Assistent DISTRONIC' has a
malfunction. _
C163691 - The calibration of control unit 'Aktiver BremsAssistent / Aktiver Abstands-Assistent DISTRONIC' has
a malfunction. The parameter is outside the permissible
range.
A108 / A108/1 - Active Brake Assist / Active Distance As- C174AFB - The calibration of control unit 'Aktiver Bremssist DISTRONIC (ABA / DTR)
Assistent / Aktiver Abstands-Assistent DISTRONIC' has a
malfunction. _
C174AFA - The calibration of control unit 'Aktiver BremsAssistent / Aktiver Abstands-Assistent DISTRONIC' has a
malfunction. _
C163691 - The calibration of control unit 'Aktiver BremsAssistent / Aktiver Abstands-Assistent DISTRONIC' has
a malfunction. The parameter is outside the permissible
range.
A108 / A108/1 - Active Brake Assist / Active Distance As- C174AFB - The calibration of control unit 'Aktiver Bremssist DISTRONIC (ABA / DTR)
Assistent / Aktiver Abstands-Assistent DISTRONIC' has a
malfunction. _
C174AFA - The calibration of control unit 'Aktiver BremsAssistent / Aktiver Abstands-Assistent DISTRONIC' has a
malfunction. _
C163691 - The calibration of control unit 'Aktiver BremsAssistent / Aktiver Abstands-Assistent DISTRONIC' has
a malfunction. The parameter is outside the permissible
range.
29.03.2021 19:44:59
© Copyright Mercedes-Benz AG
EDWMARK
Page 2 / 4
A108 / A108/1 - Active Brake Assist / Active Distance As- C174AFB - The calibration of control unit 'Aktiver Bremssist DISTRONIC (ABA / DTR)
Assistent / Aktiver Abstands-Assistent DISTRONIC' has a
malfunction. _
C174AFA - The calibration of control unit 'Aktiver BremsAssistent / Aktiver Abstands-Assistent DISTRONIC' has a
malfunction. _
C163691 - The calibration of control unit 'Aktiver BremsAssistent / Aktiver Abstands-Assistent DISTRONIC' has
a malfunction. The parameter is outside the permissible
range.
A108 / A108/1 - Active Brake Assist / Active Distance As- C174AFB - The calibration of control unit 'Aktiver Bremssist DISTRONIC (ABA / DTR)
Assistent / Aktiver Abstands-Assistent DISTRONIC' has a
malfunction. _
C174AFA - The calibration of control unit 'Aktiver BremsAssistent / Aktiver Abstands-Assistent DISTRONIC' has a
malfunction. _
C163691 - The calibration of control unit 'Aktiver BremsAssistent / Aktiver Abstands-Assistent DISTRONIC' has
a malfunction. The parameter is outside the permissible
range.
A108 / A108/1 - Active Brake Assist / Active Distance As- C174AFB - The calibration of control unit 'Aktiver Bremssist DISTRONIC (ABA / DTR)
Assistent / Aktiver Abstands-Assistent DISTRONIC' has a
malfunction. _
C174AFA - The calibration of control unit 'Aktiver BremsAssistent / Aktiver Abstands-Assistent DISTRONIC' has a
malfunction. _
C163691 - The calibration of control unit 'Aktiver BremsAssistent / Aktiver Abstands-Assistent DISTRONIC' has
a malfunction. The parameter is outside the permissible
range.
A108 / A108/1 - Active Brake Assist / Active Distance As- C163691 - The calibration of control unit 'Aktiver Bremssist DISTRONIC (ABA / DTR)
Assistent / Aktiver Abstands-Assistent DISTRONIC' has
a malfunction. The parameter is outside the permissible
range.
C174AFB - The calibration of control unit 'Aktiver BremsAssistent / Aktiver Abstands-Assistent DISTRONIC' has a
malfunction. _
C174AFA - The calibration of control unit 'Aktiver BremsAssistent / Aktiver Abstands-Assistent DISTRONIC' has a
malfunction. _
A108 / A108/1 - Active Brake Assist / Active Distance As- C163691 - The calibration of control unit 'Aktiver Bremssist DISTRONIC (ABA / DTR)
Assistent / Aktiver Abstands-Assistent DISTRONIC' has
a malfunction. The parameter is outside the permissible
range.
C174AFB - The calibration of control unit 'Aktiver BremsAssistent / Aktiver Abstands-Assistent DISTRONIC' has a
malfunction. _
29.03.2021 19:44:59
© Copyright Mercedes-Benz AG
EDWMARK
Page 3 / 4
C174AFA - The calibration of control unit 'Aktiver BremsAssistent / Aktiver Abstands-Assistent DISTRONIC' has a
malfunction. _
Operation numbers/damage codes
Op. no.
Operation text
29.03.2021 19:44:59
© Copyright Mercedes-Benz AG
Time
EDWMARK
Damage
code
Note
5412WG1
ABA sensor, for installation in threepointed star
54W10G1
ABA sensor, for installation at front
right in bumper
88W0438
If the holder is not correctly mounted
or if the sensor is loose
8801S38
If the holder is not correctly mounted
or if the sensor is loose
Page 4 / 4