NHTSA ID Number: 11024178
Manufacturer Communication Number: LI54.70-P-079322
TSB/Document Date: 2025-10-08
Summary
Complaint Red park ring around vehicle without anything in proximity. Consistently reproducible. No DTC in the PARK control unit. Vehicle is a GLC 254 OR 2024 or later 167 GLE/GLS with exterior AMG
line (option codes 772 & P31). Cause 254 GLC models or facelifted 167 GLE/GLS models (model year 2024 and on) have a re-designed front AMG bumper. Sensor position 2 and 5, front bumper park ultrasonic sensors ("USS") are occasionally interpreting the AMG bumper overhang as an object in immediate proximity or is detecting as implausible data. When this occurs, the red ring will activate in the head unit. NOTE: Other reasons can also induce the "red ring". Since current park sensor stock is still mixed "Q" levels, it is recommended to verify the concern prior to ordering and replacing. See Remedy section for verification. Remedy Verify concern is rectified via the felt tape method prior to ordering new park sensors. See attachment "Felt Tape Verification" for location of modification. Recommended felt tape part number is A0009838910 and needs to be applied to both left and right side of the vehicle. Fixes Concern: Remove the felt tape and order 2 sensors for the vehicle from the below part numbers that are applicable to the subject vehicle. Please note that if the sensors removed from the vehicle are from when it was built, the aftersales part numbers will be different, please check EPC. Valid part numbers are listed below. Replace only sensor position 2 and 5 (see attachment "Park Sensors to be Replaced"). To get the proper "Q" level sensors: 1. Check parts in current dealer inventory. Recommend to separate stock at dealer level between Q7 and earlier variants. To identify the Q level of the part, see picture "Distance Sensor Q Level". 2. If proper Q level is not found in inventory and parts need to be ordered, please order a few extras to get Q7 level. Parts that are non-Q7 are still valid for other repairs outside of this concern. 3. If dealer does not receive a Q7 sensor in their first order, please open a Star Support Ticket. Part Numbers: • A2239050005 9999 Q07 • A2239054000 9999 Q07 Does NOT Fix Concern: Please perform additional diagnostics or open a TIPS case to the Body, Chassis, Entertainment inbox.
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TSB/Document ID: LI54.70-P-079322
Replacement Service Bulletin Number:
MFR Communication Date: 2025-10-07
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: BACK OVER PREVENTION: WARNINGS
MFR Component System:
MFR Component Subsystem:
Previous TSB | Next TSB |
GLC 254 or Facelifted GLE/GLS 167 (Model year 2024 and
later) with Exterior AMG Line (Option Code 772 & P31) Red Ring Around Vehicle Without Obvious Cause - No DTC
Topic number
LI54.70-P-079322
Version
1
Function group
54.70 - Proximity warning system
Date
10/7/25
Validity
-167 (GLE/GLS) Facelift Model Year 2024 or later (SA
code 804 or 805) with Option Code 772 and P31 (AMG
Exterior Line)
-254 (GLC) with Option Code 772 and P31 (AMG Exterior
Line)
Reason for change
Complaint
Red park ring around vehicle without anything in proximity. Consistently reproducible.
No DTC in the PARK control unit.
Vehicle is a GLC 254 OR 2024 or later 167 GLE/GLS with exterior AMG line (option codes 772 & P31).
Attachments
File
Description
Red Ring.jpg
Red Ring Example
Cause
254 GLC models or facelifted 167 GLE/GLS models (model year 2024 and on) have a re-designed front AMG bumper.
08.10.2025 15:52
© Copyright Mercedes-Benz AG
CCUSHWA
Page 1 / 4
Sensor position 2 and 5, front bumper park ultrasonic sensors ("USS") are occasionally interpreting the AMG bumper
overhang as an object in immediate proximity or is detecting as implausible data. When this occurs, the red ring will
activate in the head unit.
NOTE: Other reasons can also induce the "red ring". Since current park sensor stock is still mixed "Q" levels, it is recommended to verify the concern prior to ordering and replacing. See Remedy section for verification.
Remedy
Verify concern is rectified via the felt tape method prior to ordering new park sensors. See attachment "Felt Tape Verification" for location of modification. Recommended felt tape part number is A0009838910 and needs to be applied to
both left and right side of the vehicle.
Fixes Concern: Remove the felt tape and order 2 sensors for the vehicle from the below part numbers that are applicable to the subject vehicle. Please note that if the sensors removed from the vehicle are from when it was built, the
aftersales part numbers will be different, please check EPC. Valid part numbers are listed below. Replace only sensor
position 2 and 5 (see attachment "Park Sensors to be Replaced"). To get the proper "Q" level sensors:
1.
2.
3.
Check parts in current dealer inventory. Recommend to separate stock at dealer level between Q7 and earlier
variants. To identify the Q level of the part, see picture "Distance Sensor Q Level".
If proper Q level is not found in inventory and parts need to be ordered, please order a few extras to get Q7 level. Parts that are non-Q7 are still valid for other repairs outside of this concern.
If dealer does not receive a Q7 sensor in their first order, please open a Star Support Ticket.
Part Numbers:
•
•
A2239050005 9999 Q07
A2239054000 9999 Q07
Does NOT Fix Concern: Please perform additional diagnostics or open a TIPS case to the Body, Chassis, Entertainment inbox.
Attachments
File
Description
Park Sensors to be Replaced.png
Park Sensors to be Replaced
Felt Tape Verification.png
Felt Tape Verification
08.10.2025 15:52
© Copyright Mercedes-Benz AG
CCUSHWA
Page 2 / 4
Distance Sensor Q Level.png
Distance Sensor Q Level Identification
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
Communication/information > Assistance and warning systems > Parking assist > PARKTRONIC > Acoustic warning
malfunction > General
Communication/information > Assistance and warning systems > Parking assist > PARKTRONIC > Malfunction of
displays > General
08.10.2025 15:52
© Copyright Mercedes-Benz AG
CCUSHWA
Page 3 / 4
Communication/information > Assistance and warning systems > Parking assist > PARKTRONIC > Malfunction of
displays > All displays simultaneous
Communication/information > Assistance and warning systems > Parking assist > PARKTRONIC > Malfunction of
displays > Operates without obvious cause
Communication/information > Assistance and warning systems > Parking assist > PARKTRONIC > Acoustic warning
malfunction > Operates without obvious cause
Parts
Part number
ES1 ES2 Designation
Quantity Note
EPC
A2239050005
9999 Q7
Distance Sensor
2
Must be Q7
X
A2239054000
9999 Q7
Distance Sensor
2
Must be Q7
X
Operation numbers/damage codes
Op. no.
Operation text
08.10.2025 15:52
© Copyright Mercedes-Benz AG
Time
CCUSHWA
Damage
code
Note
Page 4 / 4
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