2025 Mercedes-Benz GLS 450 4MATIC Technical Service Bulletins

127 technical service bulletins (TSBs) are on record for the 2025 Mercedes-Benz GLS 450 4MATIC. TSBs are notes manufacturers send to dealers about repair procedures for issues seen in the field. They are not recalls and do not by themselves mean a vehicle has a fault.

• 11024905Oct 31, 2025Engine, Electrical system. Mercedes-Benz AG, the manufacturer of Mercedes-Benz vehicles, has determined that on certain subject vehicles, the engine control unit software does not correspond to current production specification. The affected vehicles could exhibit rough engine running and noticeable vehicle vibrations, and misfire during the catalytic heating phase, resulting in check engine Malfunction Indicator (MIL) Lamp to illuminate.
• 11024515Oct 24, 2025Electrical system. Complaint Head-up display permanently or sporadically unavailable - with warning message in driver display (see attachment) Head-up display permanently or sporadically unavailable - without warning message in driver display. Display permanently or sporadically discolored and out of focus (see attachment). Cause Software for the A40/12 - Head-up display and N133/1 - Instrument cluster (IC). Remedy Software for the…
• 11024405Oct 20, 2025Brakes. Complaint At low speeds and light brake pressure, brakes will make a groaning or honking noise. Cause Frictional vibrations with very light brake pressure/modulations. Remedy This condition can be duplicated on most vehicles. To validate, use a like for like reference vehicle. The noise is normal behavior under the conditions listed. With very light brake pressure this noise can be induced/caused due to normal…
• 11024276Oct 10, 2025Seats. Complaint The "Easy entry and exit feature" function deactivates itself after a brief period. (see attachment). Cause The cause is currently being investigated. Remedy Update the HU7 to the latest software version, then perform a factory reset of the HU7. Steps to perform factory reset: Navigate to Settings > System > Reset > Reset to factory settings and confirm.
• 11024274Oct 10, 2025Electrical system. Complaint Clanking noise from the area of the speakers in the doors. Cause Under analysis. Remedy To narrow down the cause, first of all remove the door trim. • If the noise continues to occur even with the door trim removed, then continue the diagnosis working towards the speaker and if necessary, create a TIPS case with an informative video as an attachment.
• 11023929Oct 1, 2025Visibility (wipers, defrost, mirrors). Complaint Customer concern of Air Conditioning not cooling. *NOTE - Use of tracer DYE for leak checks is not approved. Only approved leak check procedures as per WIS are approved. Cause Possible refrigerant leak. Remedy Perform the following measures : *Important* - Photo documentation requirement is no longer in effect as of 10/1/2025. Remedy 1: Replace Evaporator (Only applies to vehicles produced PRIOR to April…
• 11023373Sep 26, 2025Suspension. Complaint Noise from front end attributable to steering gear. Cause During diagnostics of a front end noise, workshop is under the impression the noise is coming from the steering gear. Remedy Workshop diagnostics point to the steering gear as the root cause of the noise and the below LI's have been ruled out.
• 11023363Sep 25, 2025Engine. Complaint Coolant level warning in instrument cluster. Coolant odor or leaking from coolant expansion reservoir. Cause Coolant wicking through electrical contacts, or level sensor electrical connections not present in expansion reservoir.
• 11023347Sep 25, 2025Electrical system. Complaint The result from the XENTRY battery test does not match the current state of the battery. Cause The XENTRY battery tester uses the stored on-board electrical system data in the SAM module to access the health of the 12 volt battery. The XENTRY battery test may not take into account a single discharge event because the SAM or EZS cannot record the data if the battery is discharged. Note: A discharged…
• 11023208Sep 18, 2025Transmission and drivetrain. Complaint A harsh 5-4 downshift can be felt during deceleration while braking or coasting. It may be mistaken for a hard brake engagement Cause In certain driving scenarios, the transmission torque adaptation for the 5-4 downshift is recorded at a higher value. This skews the learning which leads to harsh engagement of the B06 clutches, creating the harsh 5-4 downshift Remedy "Phase 1" software was released…
• 11023209Sep 17, 2025Suspension. Complaint Concern 1 - Noises in recovery mode with the vehicle stationary Concern 2 - Noises when driving in a straight line on rough terrain Concern 3 - Noises when cornering and performing alternate steering movements Concern 4 - Non-assignable noises Cause Concern 1 - Noises in recovery mode with the vehicle stationary Concern 2 - Noises when driving in a straight line on rough terrain. These are normal…
• 11023194Sep 16, 2025Electrical system. Complaint After a software update from campaign 2025050001 of component LIB48_222 - G1/3 (48 V on-board electrical system battery) from software release A 000 902 50 48 to software release A 000 902 15 89, the fault code B183319 may be output. B183319 "The battery for the 48V on-board electrical system has a malfunction.
• 11023103Sep 11, 2025Electrical system. Complaint After a software update of component LIB48_222 - G1/3 (48 V on-board electrical system battery) from software release A 000 902 50 48 to software release A 000 902 15 89, the fault code B183319 may be output. B183319 "The battery for the 48V on-board electrical system has a malfunction.
• 11023095Sep 10, 2025Transmission and drivetrain. Complaint Throbbing/humming sound around 60mph. Howling in overdrive mode around 5th gear. Models 167.1/3 and 167.9 up to 03/2022 (except 167.987) occurs between 40-50mph Model 167.987 up to 03/2022 occurs between 55-65mph Cause Unfavorable overlapping of vibrations between drivetrain and rear axle carrier at different speeds and selected drive range. Remedy Install additional vibration damper at front axle…
• 11023046Sep 5, 2025Fuel system. Complaint A pulsating knocking noise (e.g. clattering) can be heard underneath the bench seat, particularly in the case of a full tank (1/1 fill level). Cause The vibrating air column of the purge flow volume triggers the fill limit vent valve (FLVV) to open and close repeatedly when the fuel tank is full. Remedy By reducing the fuel quantity by around 5 liters, the noise can no longer be heard.
• 11023037Sep 5, 2025Engine. Complaint Customer states CEL is active in instrument cluster, may report rough running. Cause Possible ME control unit software Remedy On applicable vehicles with complaint above, check for ME software updates and update as available. Afterwards ensure that the mixture adaptations are cleared by viewing the injector performance data in the ME. Perform a sensor rotor adaptation then perform an AMG engine adaptation…
• 11022203Aug 28, 2025Suspension. Complaint 1. Noises in recovery mode with the vehicle stationary 2. Noises when driving in a straight line on rough terrain 3. Noises when cornering and performing alternate steering movements 4. Non-assignable noises Cause Concern 1 - Noises in recovery mode with the vehicle stationary Concern 2 - Noises when driving in a straight line on rough terrain. These are normal operating noises of the hydraulic…
• 11021152Jul 31, 2025Body and structure. Complaint Fuel filler flap/socket flap sticks, cannot be opened Cause Under analysis. Remedy Create TIPS case with fault description and videos of the flap sticking. Send the TIPS case to the Body/Chassis/Entertainment inbox.
• 11021150Jul 29, 2025Electrical system. Complaint After a software update for instrument cluster (IC) control unit (N133/1) is performed the following customer complaints may be noted: - One or more menu selections (navigation, AMG, etc.) are missing from the instrument cluster display - The menu icons are present but the functionality does not appear in instrument cluster display after it is selected Cause - Communication between the instrument cluster…
• 11021105Jul 29, 2025Engine. Complaint Coolant level warning in instrument cluster. Coolant odor or leaking from coolant expansion reservoir. Cause Coolant wicking through electrical contacts, or level sensor electrical connections not present in expansion reservoir. Remedy 1. Inspect expansion tank level sensor electrical connection for wicking coolant or missing contacts. Additionally the triangular sticker may not be present on top of…
• 11021143Jul 26, 2025Forward collision avoidance, Electrical system, Lane departure. Complaint Hand detection system not operating correctly / vehicles with code 266 Fault message in instrument cluster: "Active Emergency Stop Assist not available" "Active Lane Keeping Assist not available" Cause Possible causes: the hand detection mat, the hand detection control unit, the contacts and the steering wheel harness.
• 11020697Jul 11, 2025Electrical system. Complaint Head-up display permanently or sporadically unavailable - with warning message in driver display (see attachment) Head-up display permanently or sporadically unavailable - without warning message in driver display. Display permanently or sporadically discolored and out of focus (see attachment). Cause Software for the A40/12 - Head-up display and N133/1 - Instrument cluster (IC) Remedy Software for the…
• 11020279Jul 4, 2025Visibility (wipers, defrost, mirrors). Complaint Customer concern of Air Conditioning not cooling. Cause Possible refrigerant leak at the evaporator. Remedy Perform the following measures : *Important* - ALL Photos and documents MUST be uploaded at the time of claim submission. Photos submitted after the claim was submitted will no longer be accepted. Remedy 1: (Only applies to vehicles produced prior to April 15, 2022) Must be included for warranty: 1.
• 11019750Jun 24, 2025Electrical system. Complaint The head unit cannot be operated via the steering wheel buttons on the right side. Cause A26/17 - MBUX multimedia system (head unit) software Remedy Update the A26/17 - MBUX multimedia system (head unit) to newest/latest software. Then recommission steering wheel electronics N135 - steering wheel electronics (LRE). If the problem is still present, please create a TIPS case. Note: Please do not replace any…
• 11019638Jun 12, 2025Electrical system. Complaint Head-up display permanently or sporadically unavailable - with warning message in driver display (see attachment) Head-up display permanently or sporadically unavailable - without warning message in driver display Display permanently or sporadically discolored and out of focus (see attachment) Cause Software for the A40/12 - Head-up display and N133/1 - Instrument cluster (IC) Remedy Software for the…
• 11018712May 30, 2025Electrical system. Complaint MBUX head unit display with red text box "System Inoperative". ONLY for vehicles with SA code (549+21U) or (549+U19). Cause Head unit software variant. Remedy For all chassis use Xentry to update head unit (A26/17). Target boot software number should be either: • 247 904 6600 (E905.4) OR • 247 904 7500 (E906.1) If vehicle fits all criteria and either target software is not available via Xentry, please…
• 11019018May 21, 2025Transmission and drivetrain. Complaint Single throttle lift-off clunking noise from the side shaft when moving off (audible at the outboard end). The clunk is heard once when changing from forward to reverse (and vice versa). Note: Sound file in attachment Cause If the complaint is eliminated by experimentally loosening the outboard collar nut (by 1 turn), the problem is due to micromovement in the connection between the wheel bearing inner…

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