Recall 23V463 affects 1,558 2022-2023 Mercedes-Benz AMG C43 and C 300 vehicles for unsecured wiring-harness ground connections. Repair is free at any franchised Mercedes-Benz dealer.
Mercedes-Benz is recalling 1,558 2022-2023 C 300 and AMG C43 vehicles because ground connections for the electrical wiring harness were not secured properly. The harness can overheat and increase the risk of a fire, and Mercedes-Benz dealers will repair the ground connections free of charge.
Does this recall apply to your specific vehicle?
The official, free per-VIN recall check is run by NHTSA. Enter your VIN and we'll forward you directly — and add you to a free watchlist so you hear about new recalls for your vehicle.
Check my VIN at NHTSARecallNotify doesn't check your VIN — NHTSA's official tool does. We use your email only to alert you to new recalls.
Watch this vehicle for recalls
Add it to your free watchlist and we will alert you as new federal recalls are posted for your year, make and model. New-recall alerts are rolling out now.
You are on the watchlist.
We will email you as new federal recalls are posted for your vehicle.
What's wrong?
The electrical wiring harness in the 2022-2023 Mercedes-Benz C 300 and AMG C43 carries power and signals between the engine, body electronics, and control modules. Its ground connections give the 12V and 48V electrical systems a secure return path, so current flows through the intended circuit instead of building heat at a loose connection.
On affected vehicles, several ground connections were not tightened to the required torque during production. A loose grounding nut creates extra resistance at the connection point. As current passes through that high-resistance joint, the wiring harness can overheat and damage the surrounding electrical system.
There is no warning sign before the issue starts. Once it occurs, the driver can see a warning message in the instrument cluster, which means the vehicle needs dealer inspection before the harness overheats further.
Who's affected?
Covers the AMG C43 and C 300 across the 2022 and 2023 model years, with wiring listed as the affected component.
| 2023 Mercedes-Benz AMG C43 | wiring |
|---|---|
| 2023 Mercedes-Benz C 300 | wiring |
| 2022 Mercedes-Benz C 300 | wiring |
| Units affected | 1,558 |
| Field incidents | NHTSA has logged no field incidents to date. |
A matching year and model does not guarantee inclusion. Check your VIN to confirm whether your specific sedan is included in this recall.
What's the safety risk?
The fire risk comes from an overheated wiring harness. There is no warning sign before the wiring problem starts. If a warning message appears in the instrument cluster, park safely and call a Mercedes-Benz dealer. Schedule the inspection soon. Repair is free at any franchised Mercedes-Benz dealer.
What should I do?
- Check your VIN to confirm whether your 2022-2023 Mercedes-Benz C 300 or 2023 Mercedes-Benz AMG C43 is included in this recall.
- Contact a franchised Mercedes-Benz dealer to schedule the free ground-connection inspection and repair that addresses wiring-harness overheating.
- Bring the recall notice if Mercedes-Benz mailed one. If not, reference recall number 23V463 when you call.
- Call Mercedes-Benz customer service at 1-800-367-6373 with questions before your dealer appointment.
What happens at the repair
At the dealer, a Mercedes-Benz technician inspects the ground connections for the electrical wiring harness and repairs any connections that are not secured properly. The recall repair is free, including parts and labor. Out-of-pocket repairs already paid are handled through the existing new vehicle warranty, not through a separate reimbursement program, because the involved vehicles remain under warranty. Ask the service desk how warranty coverage applies if you have prior repair paperwork.
| Reimbursement | Warranty coverage applies |
|---|
Timeline
| June 30, 2023 | NHTSA published the recall |
|---|---|
| July 7, 2023 | Dealer notification began |
| August 11, 2023 | Owner notification mailed |
| August 29, 2023 | VIN-searchable in NHTSA's database — Check your VIN to see whether this recall applies to your specific vehicle. |
| August 29, 2023 | Interim owner notification (was planned for this date) |
Frequently asked questions
What is recall 23V463?
Recall 23V463 covers 1,558 2022-2023 Mercedes-Benz C 300 and 2023 Mercedes-Benz AMG C43 vehicles with ground connections for the electrical wiring harness that were not secured properly. The harness can overheat and increase fire risk. Mercedes-Benz dealers will inspect and repair the ground connections for free.
What should I do if my 2022-2023 Mercedes-Benz C 300 or 2023 Mercedes-Benz AMG C43 is on this recall?
Check your VIN to confirm your specific vehicle is included in recall 23V463. If it is, contact a franchised Mercedes-Benz dealer to schedule the wiring-harness ground-connection inspection and repair. Reference recall 23V463 or Mercedes-Benz recall numbers 2023070016, 2023070017, 2023070018, and 2024070016 when you call.
Is the recall repair free?
Yes. Federal recall law requires manufacturers to repair safety defects at no cost to owners. Mercedes-Benz dealers will inspect and repair the electrical wiring harness ground connections for free under recall 23V463.
What is the safety risk?
The safety risk is fire. In recall 23V463, unsecured ground connections can cause the electrical wiring harness to overheat, which increases the risk of a fire. If your VIN is included, arrange the free dealer inspection and repair.
When were owners notified about this recall?
Mercedes-Benz mailed owner notification letters on August 11, 2023. If you bought the vehicle used or never received a letter, the VIN check is still the right way to confirm whether your specific C 300 or AMG C43 is included.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/23V463000 |
|---|---|
| Mercedes-Benz customer service | 1-800-367-6373 |
| NHTSA recall # | 23V463 |
| NHTSA recall # (full) | 23V463000 |
Source documents
-
Download Quarterly Report (PDF) - Download Owner Notification Letter (PDF)
- Download Owner Notice (PDF)
- Download Recall Investigation Document (PDF) (PDF)
- Download Recall Report (PDF)
- Download Misc. Document (PDF)
- Download Recall Acknowledgement (PDF)
This article is generated from NHTSA's primary recall filings and reviewed against the source on May 20, 2026. RecallNotify does not paraphrase NHTSA's consequence language; that text is reproduced as written above. Editorial standards →