CEL followed by no crank / no start. Codes u3017 and u0168. Software flashed and no crank / no start returned. SAM & EIS modules replaced and no crank/no start returned with new codes. U103F00 + P143400 + P051300. Now Mercedes is directing the replacement of the ethernet harness between the SAM and EIS. This intermittent communication or electrical fault can cause the vehicle to unexpectedly lose the ability to start. This creates a safety concern because the vehicle could fail to restart after being stopped in traffic, at an intersection, at a fuel station, or in another location where reliable starting is necessary. The intermittent nature of the failure also makes it difficult to predict when it will occur. The vehicle has sometimes operated normally for extended periods and then unexpectedly failed to start. As of filing this report the issue remains unresolved.
The worst 2026 Mercedes-Benz AMG C43 4matic problems
Ranked by number of owner complaints. Mileage and cost come from what owners wrote.
- Electrical1
- Engine1
- Transmission1
Problems by type
Tap a problem to see which part fails, at what mileage and in which other years.
- Electrical1
- Engine1
- Transmission1
Recalls 1
Electrical system: instrument cluster/panel
- What is wrong
- Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2024-2026 AMG GT, C-Class, E-Class, SL, CLE, and GLC vehicles. The infotainment control unit may reset while the vehicle is in motion and cause the instrument panel display to go blank.
- Risk
- An instrument panel display that fails to show critical safety information, such as the speedometer and warning lights, increases the risk of a crash.
- Remedy
- Dealers will update the infotainment control unit software, free of charge. Owner notification letters were mailed June 29, 2026. MBUSA's number for this recall is 2026050004. Owners may contact MBUSA customer service at 1‑800‑367‑6372. Vehicle Identification Numbers (VINs) involved in this recall will be searchable on beginning May 8, 2026.
Recall number 26V281000 · Recall details
Technical service bulletins for the 2026 Mercedes-Benz AMG C43 4matic 97
Bulletins tell dealers how to fix known problems. A warranty extension means the manufacturer pays for that repair for longer.
- Issue Mercedes-Benz AG, the manufacturer of Mercedes-Benz vehicles, is launching an OTA update to the...
- Diverse functional limitations in the vehicle in combination with various warning and fault messages in...
- Wheezing noises/squeaking noises from the front shock absorbers when passing over surface undulations and...
- Issue A software update will be performed that provides enhancements to the robustness and system...
- Slight creaking noises when steering
- CEL illuminates and/or AC does not blow cold
- Repeat workshop visit for vehicle vibration while braking from 60MPH. NOTE: Although the symptom is...
- Dear Dealer Partners, The part numbers listed in the chart below should no longer be installed and any...
- Issue after OTA Update IC Odometer Reading blank("_ _ _ _") IC Maintanence data unavailable
- Radio station cover art does not refresh when switching stations
See all 97 bulletins for the 2026 Mercedes-Benz AMG C43 4matic
What 2026 Mercedes-Benz AMG C43 4matic owners say
Most recent owner complaints, unedited.
Compare the 2026 Mercedes-Benz AMG C43 4matic
Other model years
20242026
Questions about the 2026 Mercedes-Benz AMG C43 4matic
Is the 2026 Mercedes-Benz AMG C43 4matic reliable?
Owners have filed 1 complaint about the 2026 Mercedes-Benz AMG C43 4matic, close to a typical AMG C43 4matic model year.
What is the most common problem with the 2026 Mercedes-Benz AMG C43 4matic?
Electrical system, with 1 complaint. Next is engine (1).
How many recalls does the 2026 Mercedes-Benz AMG C43 4matic have?
1 recall, covering electrical system.
Was there a recall on the 2026 Mercedes-Benz AMG C43 4matic electrical?
Yes, 1 recall: 26V281000. Check your VIN to see if your car still needs the free repair.
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