I acquired a Mercedes-Benz C300 from Mercedes-Benz of White Plains at [XXX] [XXX] on the last day of XXX Within 2 days of the car sitting in my driveway, I took it out for a drive; the electronic systems failed while I was driving on the highway. The speedometer and odometer went dark, and the turn signals stopped working. Blind Spot Warning, All electronics. I immediately return the vehicle to the dealership. One of the technicians and the manager acknowledged that not only do they see it because it’s still current, but they’ve had similar issues before. They would attempt to repair it with some software updates. In that same conversation, they acknowledged again that this problem had happened before in different capacities. The dealership still has the car 23 days later. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
The worst 2026 Mercedes-Benz C 300 4matic problems
Ranked by number of owner complaints. Mileage and cost come from what owners wrote.
- Acceleration1
- Electrical1
- Lights1
Problems by type
Tap a problem to see which part fails, at what mileage and in which other years.
- Acceleration1
- Electrical1
- Lights1
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 C 300 4matic 92
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 92 bulletins for the 2026 Mercedes-Benz C 300 4matic
What 2026 Mercedes-Benz C 300 4matic owners say
Most recent owner complaints, unedited.
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Questions about the 2026 Mercedes-Benz C 300 4matic
Is the 2026 Mercedes-Benz C 300 4matic reliable?
Owners have filed 1 complaint about the 2026 Mercedes-Benz C 300 4matic, close to a typical C 300 4matic model year.
What is the most common problem with the 2026 Mercedes-Benz C 300 4matic?
Acceleration and speed control, with 1 complaint. Next is electrical (1).
How many recalls does the 2026 Mercedes-Benz C 300 4matic have?
1 recall, covering electrical system.
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