The manufacturer’s record · Page 4 of 4

2023 Mercedes-Benz GLC 300
Manufacturer communications & TSBs.Page 4

Original record summaries, dates and identifiers for this model-year. Records 301–324 of 324, ordered newest first. Dated records on this page: Dec 1, 2022–Dec 4, 2023.

Back to 2023 Mercedes-Benz GLC 300 problems & recalls
Read the applicability before drawing a conclusion.

This archive includes service bulletins, warranty notices, software instructions and other communications. Records may repeat or supersede earlier instructions. A model-year association is not proof that a document covers every engine, trim, VIN or reported symptom, or that a repair is free.

NHTSA download snapshot: Sep 28, 2026. These are communication associations for this vehicle, not unique defects. How records are joined and counted.

Dec 4, 2023Service Bulletin/Repair Instructions

LI91.18-P-077075

NHTSA communication ID: 10248162

NHTSA source summary · Original PDF not reviewed by Recallfolio

Crease formation on genuine leather seat covers in vehicles with low mileage • Objects left on the seats for extended periods of time (pressure marks). • Objects wedged between the seat backrest and seat cushion (e.g. seat belt buckle). • Light initial creases due to vehicle handling. • Light creases in the outer covers originating from the production process (missing finish). Heat treatment of the seat covers using heat gun and plastic wedge. Be very careful to not overheat the seat material!

Source components: SEATS.

Source record 10248162 at NHTSA
Dec 4, 2023Service Bulletin/Repair Instructions

LI46.35-P-077076

NHTSA communication ID: 10248157

NHTSA source summary · Original PDF not reviewed by Recallfolio

Control unit N68 - electric power steering Fault P063544 - The electric power steering has a malfunction. There is a fault in the data memory. with fault freeze frame data "Mon_ID 320" in the "stored" status stored in the fault memory of control unit N68. No functional restrictions of the electric power steering or warning messages are visible. Faults occur in the event of a software update or when initializing the control unit for the electric power steering N68. The fault code can be ignored and the fault memory of the control unit for the electric power steering N68 can be deleted. It is not necessary to replace the electric power steering.

Source components: STEERING.

Source record 10248157 at NHTSA
Dec 1, 2023Service Bulletin/Repair Instructions

OTA-Head Unit SW

NHTSA communication ID: 10248203

NHTSA source summary · Original PDF not reviewed by Recallfolio

Mercedes-Benz AG, the manufacturer of Mercedes-Benz vehicles, has determined that on certain MY19-23 A-Class, CLA, CLS, E-Class, EQB, GLA, GLB, GLC, GLE, GLS, AMG GT (177, 118, 257, 213, 238, 243, 247, 253,167, 290 platform) vehicles, the head unit software does not correspond to the current series production configuration. The head unit will receive an OTA update to optimize the "Live Traffic Information" service for the navigation system. Additional product improvements including infotainment system robustness will be implemented. The software update will be downloaded in the background. The subsequent installation takes roughly 45 minutes and requires the customer's consent in the vehicle. During installation, the system can be used without restriction. The new software will be active after the vehicle has been switched off. MBUSA will conduct an OTA service campaign. Remote software updates are automatically downloaded and installed in the customer’s vehicle free of charge and do not require a dealer visit. No customer letter will be mailed for this OTA software update.

Source components: ELECTRICAL SYSTEM.

Source record 10248203 at NHTSA
Oct 20, 2023Service Bulletin/Repair Instructions

NCU -MBUX SW OTA

NHTSA communication ID: 10244748

NHTSA source summary · Original PDF not reviewed by Recallfolio

Mercedes-Benz AG (“MBAG”), the manufacturer of Mercedes-Benz vehicles, has determined that on certain MY21-23 C-Class, EQS, S-Class, SL, EQE, GLC (206, 296, 297, 223, 232, 294, 295, 254 platform) vehicles, the head unit software will be updated remotely to MBUX 2.4. With this update, customers will benefit from many new functions and features, such as video streaming (note that the Entertainment Package Plus is required for streaming and can be purchased from the Mercedes me Store by the end of 2023), Dolby Atmos®, MBUX Voice Assistant (NewsFlash & Tourguide), a personal decorative image on the front passenger display, and more. Please see NCU issued on September 5th, 2023 from Product Management and Digital House team “Additional New Connected Features Coming Soon”. MBUSA will conduct an OTA service campaign. Remote software updates are automatically downloaded and installed in the customer’s vehicle free of charge without an additional workshop visit via the data link of the communication module. No customer letter will be mailed for this software update.

Source components: ELECTRICAL SYSTEM · ELECTRICAL SYSTEM:SOFTWARE.

Source record 10244748 at NHTSA
Oct 12, 2023Service Bulletin/Repair Instructions

LI32.25-P-076956

NHTSA communication ID: 10244735

NHTSA source summary · Original PDF not reviewed by Recallfolio

Wheezing noises from the front shock absorbers when passing over surface undulations and rough road. The noises may become more conspicuous with warm damper oil. The flow noises of the damper oil are currently being analyzed. The wheezing noises are currently considered standard for the series. Replacing the shock absorbers will yield no benefit and will not remedy the problem. Please report complaints regarding these wheezing noises via TIPS.

Source components: SUSPENSION · SUSPENSION:FRONT:SHOCK ABSORBER.

Source record 10244735 at NHTSA
Oct 2, 2023Service Bulletin/Repair Instructions

LI77.21-P-075807

NHTSA communication ID: 10244745

NHTSA source summary · Original PDF not reviewed by Recallfolio

Sliding sunroof panel of panoramic sliding sunroof reversed (temporarily, once, multiple times) during closing process without entrapment event. Sensitive parameterization of the automatic reversing function of the panoramic roof. Perform SW update of panoramic roof control unit (PSD, A98, TSSR254).

Source components: STRUCTURE · VISIBILITY:SUN/MOON ROOF ASSEMBLY.

Source record 10244745 at NHTSA
Sep 8, 2023Service Bulletin/Repair Instructions

Ll54.10-P-076896

NHTSA communication ID: 10243306

NHTSA source summary · Original PDF not reviewed by Recallfolio

12V message in IC when starting the vehicle. SW updates need to be performed. Follow the guided test for FC U116000 in N73/3*1 EIS CU. Perform the SW checks and updates. Fully charge both 12V and 48V batteries. After, perform a few drive/park cycles with at least 1 overnight park cycle. If the 12V message is no longer present, release the vehicle.

Source components: ELECTRICAL SYSTEM.

Source record 10243306 at NHTSA
Aug 28, 2023Service Bulletin/Repair Instructions

NCU-HU SW Update

NHTSA communication ID: 10241527

NHTSA source summary · Original PDF not reviewed by Recallfolio

Mercedes-Benz AG (“MBAG”), the manufacturer of Mercedes-Benz vehicles, has determined that on certain MY 2018-2023 C-Class, EQE, EQE SUV, EQS, EQS SUV, GLC, GLE and S-Class (206, 295, 294, 297, 296, 254, 167 and 223 platform) vehicles, the communication module software does not correspond with the latest series production configuration. The update is free of charge and will be carried out in the background. The installation will eliminate software errors for a better entertainment experience. The update will show after the ignition has been cycled. MBUSA will conduct an OTA service campaign. A workshop visit for the customer is not required since remote software updates are automatically downloaded and installed in the customer’s vehicle. The OTA may be validated as successful on the customer’s Mercedes Me connect app under “Over-the-Air Vehicle Updates” as “Update for the communication module”. If the OTA is successful it will show a green “installed” and date of installation in the Over-the-Air update section.

Source components: ELECTRICAL SYSTEM · ELECTRICAL SYSTEM:SOFTWARE.

Source record 10241527 at NHTSA
Aug 22, 2023Service Bulletin/Repair Instructions

Ll54.10-P-076823

NHTSA communication ID: 10241510

NHTSA source summary · Original PDF not reviewed by Recallfolio

In the instrument cluster, the symbol for "12 V battery" and the message "Switch on vehicle" may sporadically be displayed. As a consequence of this, the fault codes B 1 FCB97 (=> N73/3) and U 116000 (=> N73/3*1) are stored in the fault memory. In the subsequent analysis of the 12 Von-board electrical system data, the following parameters are conspicuous (see picture 1 in the attachment): • Charge balance negative when stationary. • Interior CAN bus is awake for an unusually long time. • 12 V battery SOC (state of charge) during subsequent engine start is 45% or less. NOTE: Once the 12 V battery SOC has exceeded 50% for the first time, the symbol and the message in the instrument cluster disappear again. The door control unit (N69/x) may sporadically keep the interior CAN bus awake. NOTE: Exclusively door control units with the HW item numbers A2239019917 and A2239010018 can be affected. Open a TIPS case and include the following: 1. Initial Quick Test 2. N73/3 EZS CUL 3. N73/3*1 EZS CUL 4. Date and time of occurrence

Source components: ELECTRICAL SYSTEM.

Source record 10241510 at NHTSA
Aug 21, 2023Service Bulletin/Repair Instructions

LI82.70-P-076832

NHTSA communication ID: 10241536

NHTSA source summary · Original PDF not reviewed by Recallfolio

Phone call log is not shown in the MBUX display. If the telephone connects with the head unit again, the call log may not be sent. Current software release for the A26/17 - MBUX multimedia system (Head unit) Currently there is no remedy available. Replacing the hardware will not resolve the symptom. • New software for the A26/17 - MBUX multimedia system (Head unit) will be made available with software version E444.x (scheduled for Q4/2023)

Source components: ELECTRICAL SYSTEM · EQUIPMENT:ELECTRICAL:INFOTAINMENT.

Source record 10241536 at NHTSA
Aug 18, 2023Service Bulletin/Repair Instructions

LI91.10-P-076798

NHTSA communication ID: 10241519

NHTSA source summary · Original PDF not reviewed by Recallfolio

Noise at front seats between seat-back lining and function carrier. Noise is caused by friction of the two component parts. Remove the seat-back lining (back panel) of the front seat concerned using a special tool. Via adhesive bonding, affix 2 pieces of felt at the lower seat backrest structure (see pic. 1). Via adhesive bonding, affix 2 pieces of felt in the upper area of the seat backrest at the function carrier (see pic. 2). Pic. 3 shows the function carrier from behind: Begin applying the adhesive bonding of the felt at the edge (see red arrow). Ensure that the adhesive bonding is applied in the center. Then fold the felt forward. Pic. 4 shows the function carrier from the front: Continue to apply the adhesive bonding to the forward fold. Ensure that the adhesive bonding is applied in the center.

Source components: SEATS.

Source record 10241519 at NHTSA
Aug 18, 2023Service Bulletin/Repair Instructions

LI72.20-P-075232

NHTSA communication ID: 10241515

NHTSA source summary · Original PDF not reviewed by Recallfolio

When operating a control point to open the trunk lid or the tailgate, the trunk lock unlocks, but there is no actuation of the trunk control/tailgate control drive unit (M51/3). Faulty microswitch signal of trunk lock. In the event of a problem, the status of the trunk lock (picture 1) does not change during opening/closing of the trunk lid or tailgate. The function of the interior trunk release is not affected. Replace trunk lock (A85/5).

Source components: LATCHES/LOCKS/LINKAGES · STRUCTURE · STRUCTURE:BODY:TAILGATE.

Source record 10241515 at NHTSA
Jul 28, 2023Service Bulletin/Repair Instructions

LI82.62-P-076756

NHTSA communication ID: 10240159

NHTSA source summary · Original PDF not reviewed by Recallfolio

Perceptible volume jumps at 15 and 10 mph. When reducing the speed of the vehicle, the volume is reduced in clearly perceptible jumps. This is particularly perceptible at a moderate basic volume (i.e. lower than typical levels of household noise). Software in sound control unit SND7 (N40/3) Currently no remedy available. Replacing the hardware will not remedy the problem! Remedy will be available with next software version for sound control unit (Q4/2023)

Source components: EQUIPMENT · EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC..

Source record 10240159 at NHTSA
Jul 24, 2023Service Bulletin/Repair Instructions

LI20.00-P-076708

NHTSA communication ID: 10240165

NHTSA source summary · Original PDF not reviewed by Recallfolio

Check engine lamp activated, coolant warning message, and engine fan running at full speed. Below fault codes stored in N127 PTCU related to LIN network components. U063200, U063287, U02A900, U02A987, U0698E4, U0698E5, U02C800, U02C887, U063B00, U063B87 Under analysis. Create a TIPS case with findings of below checks. Include: • Initial quick test showing fault codes. • Details from owner on events leading up to symptoms Inspect wiring and connections (pins/sockets) for damage or corrosion at below components. -N127 -X25/7x1 -M4/7 Engine cooling fan -Y73/1 coolant directional control valve -M43/7 circulation pump 2 low-temperature circuit -M43/8 circulation pump 3 low-temperature circuit

Source components: ELECTRICAL SYSTEM · ENGINE AND ENGINE COOLING.

Source record 10240165 at NHTSA
Jul 19, 2023Service Bulletin/Repair Instructions

NCU - HU Update

NHTSA communication ID: 10240250

NHTSA source summary · Original PDF not reviewed by Recallfolio

Mercedes-Benz AG (“MBAG”), the manufacturer of Mercedes-Benz vehicles, has determined that on certain MY 2021-2024 C-Class, EQE, EQE SUV, EQS, EQS SUV, GLC, GLE and S-Class (206, 295, 294, 297, 296, 254, 167 and 223 platform) vehicles, the head unit software does not correspond with the latest series production configuration. The update is free of charge and will be carried out in the background. The installation will eliminate software errors for a better entertainment experience. MBUSA will conduct an OTA service campaign. A workshop visit for the customer is not required since remote software updates are automatically downloaded and installed in the customer’s vehicle. The OTA may be validated as successful on the customer’s Mercedes Me connect app under “Over-the-Air Vehicle Updates” as either “Software Update MBUX 2.4” or “Software Update Hermes 1.5 E522.8”. If the OTA is successful it will show a green “installed” and date of installation in the Over-the-Air update section.

Source components: ELECTRICAL SYSTEM.

Source record 10240250 at NHTSA
Jul 14, 2023Service Bulletin/Repair Instructions

SC-2023060007

NHTSA communication ID: 10240256

NHTSA source summary · Original PDF not reviewed by Recallfolio

CL - 2023060007 Update Powertrain Control Unit Software

Source components: ELECTRICAL SYSTEM · ENGINE AND ENGINE COOLING · POWER TRAIN.

Source record 10240256 at NHTSA
Jul 13, 2023Service Bulletin/Repair Instructions

LI80.61-P-076671

NHTSA communication ID: 10240169

NHTSA source summary · Original PDF not reviewed by Recallfolio

The trunk lid only opens/closes successfully after several attempts. Coding in the Hands-Free Access control unit (N38). Perform SCN coding in Hands-Free Access control unit (N38).

Source components: ELECTRICAL SYSTEM · STRUCTURE · STRUCTURE:BODY:TRUNK LID.

Source record 10240169 at NHTSA
Jun 26, 2023Service Bulletin/Repair Instructions

LI46.80-P-076622

NHTSA communication ID: 10238417

NHTSA source summary · Original PDF not reviewed by Recallfolio

Rattling/knocking noise from the rear axle steering is audible when driving on rough terrain or cobblestones. Relative movement of toothed rack. Please create a TIPS case. Attach a detailed description of the noise complaint, together with a recording of the noise, to the TIPS case.

Source components: STEERING.

Source record 10238417 at NHTSA
Jun 16, 2023Service Bulletin/Repair Instructions

NCU-2023060007

NHTSA communication ID: 10238431

NHTSA source summary · Original PDF not reviewed by Recallfolio

Mercedes-Benz AG (“MBAG”), the manufacturer of Mercedes-Benz vehicles, has determined that on certain MY 2023 GLC (254 platform) vehicles, the powertrain control unit software might not meet current specifications. Under certain conditions, it may not be possible to start the vehicle. MBUSA will conduct a service campaign. An authorized Mercedes-Benz dealership will update the powertrain control unit software in the affected vehicles.

Source components: ENGINE AND ENGINE COOLING · POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE:SOFTWARE.

Source record 10238431 at NHTSA
May 26, 2023Service Bulletin/Repair Instructions

NCU-2023050002

NHTSA communication ID: 10237268

NHTSA source summary · Original PDF not reviewed by Recallfolio

Mercedes-Benz AG (“MBAG”), the manufacturer of Mercedes-Benz, has determined that on certain Model Year (“MY”) 2023 GLC (253 platform) vehicles, the seam seal on a small portion of the right A-pillar does not correspond with current production specifications. It cannot be ruled out that a leak may occur due to an inconsistency in this seam seal. What We’re Doing MBUSA will conduct a service campaign. An authorized Mercedes-Benz dealer will repair the seam seal at the A-pillar.

Source components: STRUCTURE.

Source record 10237268 at NHTSA
Apr 19, 2023Service Bulletin/Repair Instructions

LI82.85-P-076200

NHTSA communication ID: 10235670

NHTSA source summary · Original PDF not reviewed by Recallfolio

Complaint Station logos are no longer displayed in the radio after updating or SCN coding the A26/17 head unit. Cause Under analysis. Remedy Currently, there is no remedy available. Please open a TIPS case for support.

Source components: ELECTRICAL SYSTEM.

Source record 10235670 at NHTSA
Apr 11, 2023Service Bulletin/Repair Instructions

LI82.85-P-076157

NHTSA communication ID: 10235669

NHTSA source summary · Original PDF not reviewed by Recallfolio

Complaint Brief connectivity interruptions when using Apple CarPlay over Wi-Fi, for example when driving underneath toll bridges. Cause There may be interruptions to WiFi as a result of external interference. This is particularly observed around toll bridges. Remedy There is currently no remedy and replacing hardware does not resolve the problem. An alternative option would be to use Apple CarPlay wired. In the FUP4 variant of the head unit software (Q1/2024), stability improvements have been made to the Wi-Fi connection.

Source components: ELECTRICAL SYSTEM.

Source record 10235669 at NHTSA
Mar 1, 2023Service Bulletin/Repair Instructions

LI82.70-P-075967

NHTSA communication ID: 10233791

NHTSA source summary · Original PDF not reviewed by Recallfolio

Complaint Wireless charging start/charging behavior of iPhone 14 is not optimal Cause Change in iPhone software (iOS) Remedy There will be optimized software for iPhone 14 iOS (target date 05/2023). This LI will be updated when the software becomes available. A software update with currently available iOS software will not be effective for the iPhone 14.

Source components: ELECTRICAL SYSTEM.

Source record 10233791 at NHTSA
Dec 1, 2022Service Bulletin/Repair Instructions

LI46.15-P-063353

NHTSA communication ID: 10228807

NHTSA source summary · Original PDF not reviewed by Recallfolio

Complaint Height adjustment of electric steering column adjustment jammed in the top/bottom adjustment position (e.g. with Easy Entry function). Cause Height adjustment moves to the top/bottom limit stop and jams.

Source components: STEERING.

Source record 10228807 at NHTSA