There are 4 owner-reported electrical system complaints for the 2022 Mercedes-Benz SL-Classin NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
MBUX system would not turn on. Warnings of Blind Spot in operatable, Parktronic not operatable. Was not able to access any features through MBUX. Climate Control, Operation of Covertable Top, Maps, all options run through MBUX. It was a safety issue because the battery light comes on, after being on charge, and without access to MBUX, you do not know if the car will stall on the freeway, or at a stop light. Safety issues also around front lift without cameras access. The vehicle was inspected at the Mercedes Benz Dealer and they fixed it, but after a day, the battery still isn't charging after numerous attempts and recalls on 12v rewiring. Since I have bough the vehicle, many warning lights have always come on, been ficed and then come back on.
The contact owns a 2022 Mercedes-Benz AMG SL55. The contact stated that upon entering the vehicle, the vehicle failed to detect the presence of the key, after which the vehicle failed to start. No warning lights were illuminated. The vehicle was taken to the dealer, who was unable to determine the cause of the failure. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was 9,000.
Initially got a transmission malfunction warning and to turn car off. The cars battery keeps dying at only 1500 miles. Constantly needs to be on trickle charger. Recently the car died, charged battery. Car turned over for 3 seconds then stalled. Now car even with full battery with turn over but will not start whatsoever. Has to be towed. Multiple people ok forms reported this same issue.
The electrical systems drains the two batteries after the car sits idle for a few hours. If it can be started, many of the safety features are inoperable until the car is driven for 30 or 40 minutes. I've had it to multiple Mercedes dealers and all they do is re-charge the battery and told me to get a trickle charger. Even after being on the charger, it failed to start. I was the third owner. No one had owned this car for more that a year. Service records indicate that previous owners had same issues. I purchased it in Nov of 2024 from Mercedes Benz of Clearwater, FL. I took it back and traded it in for a different car on September 6, 2025. Three days later they had the same car back on the lot for sale for $96K, which was over $10K more than what they gave me as a trade-in.
Complaints are unverified consumer reports submitted to NHTSA. A high complaint count may reflect vehicle popularity, not defect severity. Data sourced from NHTSA public records.
Data synced from NHTSA on Apr 26, 2026