WenmarOpen by Wenmar Pro

Service campaign NCU - 2026060002

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService campaign
NHTSA id11034041
Published by NHTSA2026-06-24
Manufacturer's numberNCU - 2026060002
Manufacturer's date2026-06-26
NHTSA componentSTRUCTURE:BODY

NHTSA's summary

Work procedure A 1. Replace longitudinal member panel at right and left. Does not apply to VIN W1KRJ4xxxxxx11347! Please send an email to your AOM with the subject "Code 26P8891012" and include the following information! Vehicle identification number (VIN) Address of ordering dealer to which the component part is to be sent Work procedure B 1. Replace the dummy bumpers fitted to the vehicle. Please send an email to your AOM with the subject "Code 26P8891012" to have parts ordered! Vehicle identification number (VIN) Which component part is affected? (front bumper, rear bumper) Provide documentation of the dummy component parts, including a representative photo of each part Address of ordering dealer to which the component part is to be sent The new replacement parts (body parts) will undergo an internal check before being sent free of charge to the specified address. Scrap the dummy component parts! Parts Parts will be ordered by contacting your AOM with

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Body and frame

Vehicles listed
MERCEDES-BENZ AMG GT432026 (the catalog's model; the bulletin names a series or trim of it)
MERCEDES-BENZ AMG GT55 4MATIC+2026 (the catalog's model; the bulletin names a series or trim of it)

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Other bulletins for the same vehicles and component
LI82.62-P-0786312026-10-06. Service bulletin. 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. Note: Please refer to this document in the warranty claim and, once diagnosis is completed, select the damage code depending on the component part that is causing the issue. • If the noise stops when the door trim is removed, please proceed in accordance with LI72.10‑P‑067691. Information: In this case, do not use a damage code for the speakers in the warranty claim!
LI82.62-P-0786312026-08-11. Service bulletin. 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. Information: Please refer to this document in the warranty claim and, after completing diagnosis, select the damage code corresponding to the component part that caused the problem. • If the noise stops when the door trim is removed, please proceed in accordance with LI72.10-P-067691. Information: In this case, do not use a damage code for the speakers in the warranty claim!
LI40.10-P-0592482026-07-24. Service bulletin. Complaint Crackling and cracking noise from the outer wheel on the front axle when cornering Cause The noise is generated by a micromovement on the contact surface between the rim and the brake disk (wheel bolt group) and may be intensified by potential soiling. The more lightweight rim (AMG forged rim) transmits the noise louder; in the case of cast rims, the noise is generally not perceptible. This is not a technical defect, but rather a complaint concerning comfort. Safe operation of the vehicle is ensured at all times. Remedy Important note: The operations described below do not represent a permanent remedy in every case. The noise may reoccur again after an indefinite period of time; sanding the rims with abrasive media multiple times is not permissible. Only cleaning using the Hazet tool 4960-160 (recommendation) can be performed without any concerns each time the wheel is changed or if the complaint reoccurs. Replacing the parts (rim, wheel bolts, wheel bearings, wheel hub, brake disk) is not expedient in the event of this complaint. ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- Clean the components of the wheel bolt connection according to the WIS instructions Sand down the rim and brake disk bowl by performing the following steps: • Manually sand rim (old design only) in area of water drain bores (Figure 1; item A), approx. 1.5 cm left and right of water drain bore (Figure 2) Note: Use abrasive paper with grit size 80. The grooving in this area should no longer be visible (sand down approx. 0.1-0.2mm) • Also sand brake disk bowl using emery cloth or abrasive paper with a grain size of 120 • For vehicles equipped with the AMG ceramic brake system (B07), abrasive paper may not be used for cleaning on the brake disk side Note: Do not use any cleaning agent when cleaning on the rim side. Cleaning using abrasive paper with a grain size of 80 will suffice. Do not apply any grease, lubricant or paste after cleaning The brake disk bowl should be "bare metal" in the area of the imprints made by the hole (Figure 3)
LI88.50-P-0802632026-07-14. Service bulletin. Complaint The trunk lid does not open or close completely and must be operated manually by the customer. The following fault codes are stored in the PTCM control unit: • P1CA000 • B188C2A Cause If the trunk lid is repeatedly opened manually or the vehicle has experienced undervoltage, the trunk lid loses its normalization due to faulty software coding. Remedy For vehicles with a production date up to 01/22/26 (SL (232)) or 01/27/26 (GT (192)) 1. Update the HKS N121/1 control unit and perform SCN coding. (If no new software is available, still perform SCN coding) 2. Perform normalization of component 'N121/1 (Liftgate control control unit)'. Vehicles produced from January 22, 2026 (SL (232)) and January 27, 2026 (GT (192)) onward were factory-fitted with the correct Software Calibration Number Table.
LI67.30-P-0784682026-07-14. Service bulletin. Complaint Creaking/cracking sounds detectable in upper area of the side window panes Cause A locating rivet used during vehicle production to hold the side window pane in the correct position relative to the body- in-white. Remedy The rivet can be removed as follows: 1. Loosen upper molded part of seal from B-pillar bar and body-in-white flange → CAREFUL: Do not pull off too far (attachment 1). 2. Secure rivet set on back with butyl ball so that it does not become lost during next operation steps. Protect glass using doubled-up adhesive tape (attachment 2). 3. Bore rivet head from outside (drill bit diameter 8mm) and suction off shavings at the same time → CAREFUL: Avoid shavings falling between B-pillar bar and seal (attachment 3). Drive remaining rivet inward with a punch (d=3mm) (attachment 4) and remove. The butyl ball from Step 2 prevents it from falling down. 4. Seal opening formed by bored rivet head with a butyl ball d=4mm from inside to outside (attachment 5). Seal sanding spot at B-pillar bar against corrosion with black touch-up paint pen. 5. Fix seal in place at B-pillar bar again.
PSL-NCU Return Parts 7/32026-07-13. Other. Dear Mercedes-Benz USA Dealers, The part numbers listed in the chart below should no longer be installed, and any existing stock must be returned to your facing PDC. The deadline for all dealer returns is no later than Thursday, July 23rd, 2026. After July 23rd, returns of these parts will no longer be accepted. These parts should be returned via ZSR Special Return, using item category SCM Authorized Part Return. Please include a copy of this NCU as your authorization to return these parts. This procedure will not affect your return allowance. All returned parts will be replaced in accordance with the chart provided below.
LI88.20-P-0800342026-05-11. Service bulletin. Complaint Replacement rear lower carbon bumper cover is delivered without Parktronc (PTS) sensor holders. This is observed during part replacement when the bumper is received without holders included. Applicable Bumper Part Numbers (SA 773): • A1928854401 • A1928855601 Cause There is no underlying defect → See Remedy Remedy When replacing the rear lower carbon bumper cover, the PTS sensor holders must be ordered separately. Required Additional Parts: • A1928883700 PTS holder, left • A1928883800 PTS holder, right If the item numbers cannot be ordered regularly via Paragon, please open a TIPS case to the Body/Chassis/Entertainment inbox and provide the following information: • recipient address • contact person The parts will then be made available accordingly. Installation Notes PTS holders are supplied with adhesive tape and positional markings. Ensure the bonding surface of the bumper trim is clean and dry. Position the PTS holder correctly and apply firm, even pressure to ensure proper adhesion and secure bonding.
LI67.30-P-0803432026-03-11. Service bulletin. Complaint Wind noises in the area of the mirror triangle on the front doors/side window panes Cause Potential causes: • Adjustment of the side window panes • Adjustment of the doors • Influence of seals • Influence of assembly Remedy • If the wind noises only occur on one side: Perform comparison of right/left of the window and door adjustment • If necessary, correct window and door adjustment according to WIS. For the windows, observe the insertion depth in the Z position and the Y position on the mirror triangle in particular. • Check inner seal for deformations. To do so, observe attachment 1 and attachment 2. If a deformation (waviness) can be ascertained: Replace seal or reform back into place using heat and fix in place using cold. • Check outer sealing rail to vertical sealing lip of the mirror triangle. To do so, observe attachment 3. If the sealing rail collides with the vertical sealing lip of the mirror triangle: Either route it such that it rests above the vertical sealing lip of the mirror triangle or shorten. • Check external sealing rail for correct assembly. To do this, ensure that it is engaged into the three existing mounting straps on the door. See Attachment 4. Also ensure that the outer sealing rail is correctly positioned in the x-direction and closes off flush. See Attachments 5 and 6 for this. Also ensure during assembly that the outer sealing rail is inserted beneath the mirror triangle. See Attachment 7. • Check the inner seal, especially in the mirror triangle area, for correct assembly. See Attachment 8.
LI88.50-P-0802632026-03-11. Service bulletin. Complaint The trunk lid does not open or close completely and must be operated manually by the customer. The following fault codes are stored in the Tailgate Control (HKS) control unit: P1CA000 & B188C2A Cause If the trunk lid is repeatedly opened manually or the vehicle has experienced undervoltage, the trunk lid loses its normalization due to faulty software coding. Remedy For vehicles with a production date up to 01/22/26 (232) or 01/27/26 (192): Update the HKS N121/1 control unit and perform SCN coding. • If no new software is available, perform SCN coding. Vehicles with a production date 01/22/2026 (232) or 01/27/2026 (192) and later have already received the correct QNT from the factory.