Shock Symbol with "Do Not Drive Over 50MPH" Instrument Cluster Notification - U013281 and C156F00
in A108/X Active Roll Stabilization Control Units
Topic number

LI32.35-P-079752

Version

2

Function group

32.35 - Stabilizer

Date

2/12/26

Validity

167 (GLE and GLS), 223, and 294 with Option Code 465
AMG ONLY

Reason for change

Updating Remedy

Complaint
Shock symbol in instrument cluster with "Do Not Drive Over 50MPH" message
AND
DTC's in A108/2 or A108/3:
U013281 - Communication with control unit "Suspension" has a malfunction. Incorrect data were received.
C156F00 - The signal values of the level sensors are implausible.

Cause
Physical layer wiring to the level control sensors B22/X.

Remedy
Check A108/2 and A108/3 for freeze frame data section "ZF_error_handler". The text will provide a good place to
start.
Example: "SPC_FEHLER_VehLvl_Stat_HP_AMG_AR2_SNA_VehLvl_RR_V2_AMG" indicates the Right Rear may have initiated the DTC. See attached picture for reference.
Is concern reproducible? If so, watch actual values in Xentry and see which sensor is setting the implausible value.
Use Hioki to measure wiring to all four level sensors from N51/8.
Use above DTC freeze frame data to physically inspect specific wiring as mentioned in the freeze frame data above.
Check all level sensors for damage, correct mounting, level sensors bound or not moving, etc...

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If vehicle exhibits concern after all of the above is completed, please open a TIPS case to the Body, Chassis, Entertainment Inbox.

Attachments
File

Description

A108 U013281 Handler.png

ZF Error Handler Text

Disclaimer
NOTE: The information contained in this document is intended for use by trained, professional technicians with the
knowledge to properly and safely perform diagnosis and repairs on Mercedes-Benz vehicles, using Mercedes-Benz
approved tools and equipment. It informs service technicians about conditions that could occur in certain vehicles and
provides information that could assist in proper vehicle diagnosis, service, or repair. It does not indicate that a defect
is present in any vehicle referenced in this document nor does it imply warranty coverage. DO NOT assume that a
symptom or condition, or a described cause of a symptom or condition, affects any particular vehicle or groups of vehicles, or that a described repair applies to any particular vehicle or groups of vehicles. There can be multiple causes
resulting in the same or similar symptoms or conditions described in this document, and trained professional service
technicians must use their diagnostic skills to make evaluations on a case-by-case basis. The information contained
in this document does not guarantee warranty coverage nor does it extend the vehicle’s warranty in any way.

Symptoms
Chassis/suspension > Suspension/Dampening > Suspension System Function > Indicator lamp is on
Chassis/suspension > Suspension/Dampening > AIRMATIC > Indicator lamp > lit
Chassis/suspension > Suspension/Dampening > Electronic level control ENR > Malfunction
Chassis/suspension > Suspension/Dampening > Roll control > Malfunction

Control unit/fault code
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Control unit

Fault text

A108/3 - Active roll stabilization REAR (Roll control)
(EARS167_R)

C156F00 - The signal values of the level sensors are implausible. _
U013281 - Communication with control unit "Suspension"
has a malfunction. Incorrect data were received.

A108/2 - Active roll stabilization FRONT (Roll control)
(EARS167_F)

C156F00 - The signal values of the level sensors are implausible. _
U013281 - Communication with control unit "Suspension"
has a malfunction. Incorrect data were received.

Operation numbers/damage codes
Op. no.

Operation text

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Time

SAHARRY

Damage
code

Note

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