According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 2023 Mercedes-Benz E-Class has 3 documented known issues, with 2 rated critical. The most serious are Fuel Pump Delivery Module Failure Leading to Extended Crank, Stalling, or No-Start ($900-$1,800 repair) and 48V Integrated Starter-Generator / DC-DC Converter Failure Causing Sudden Power Loss and No-Restart ($1,200-$4,500 repair). Across all issues with published estimates, repair costs range from $250 to $4,500. DIY maintenance guides at au7o.io.