2021 Mercedes-Benz E-Class Problems: 3 Known Issues
2021 model year · NHTSA recalls, manufacturer TSBs, and owner forum reports · Updated October 2026
According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 2021 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.
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All 3 Known Issues
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Frequently Asked Questions
What are the most common Mercedes-Benz E-Class problems?
According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 2021 Mercedes-Benz E-Class has 3 documented issues. The most frequently reported are: Fuel Pump Delivery Module Failure Leading to Extended Crank, Stalling, or No-Start, 48V Integrated Starter-Generator / DC-DC Converter Failure Causing Sudden Power Loss and No-Restart, MBUX / Instrument Cluster Black Screen, Rebooting, and Rear Camera Inoperative Due to Infotainment Software Faults. Of these, 2 are rated critical and should be addressed promptly.
Is the Mercedes-Benz E-Class reliable?
The 2021 Mercedes-Benz E-Class has 3 known issues compiled from NHTSA recalls, manufacturer TSBs, and owner forum reports. 2 issues are rated critical: Fuel Pump Delivery Module Failure Leading to Extended Crank, Stalling, or No-Start and 48V Integrated Starter-Generator / DC-DC Converter Failure Causing Sudden Power Loss and No-Restart. Prospective buyers should inspect for these issues and factor potential repair costs into their purchase decision. Regular maintenance following the manufacturer's schedule helps prevent many common problems.
How much does it cost to fix common Mercedes-Benz E-Class problems?
Repair costs for known Mercedes-Benz E-Class issues range from $250 to $4,500, depending on the specific problem and whether you choose DIY or professional repair. The most critical issue, Fuel Pump Delivery Module Failure Leading to Extended Crank, Stalling, or No-Start, typically costs $900-$1,800 to repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.
What is the 2021-2023 Mercedes-Benz E-Class Fuel Pump Delivery Module Failure Leading to Extended Crank, Stalling, or No-Start?
A number of late-model E-Class owners reported hard starting, long crank times, hesitation, and occasional stalling traced to low-pressure fuel supply faults, including in-tank fuel pump or delivery module issues. Mercedes-Benz recalled 2021-2023 E-Class vehicles (NHTSA 23V-445,… Repairs typically run $900-$1,800. Severity: high.
What is the 2021-2023 Mercedes-Benz E-Class 48V Integrated Starter-Generator / DC-DC Converter Failure Causing Sudden Power Loss and No-Restart?
Multiple owners of facelift W213 E-Class models with the M256 mild-hybrid system reported sudden warning messages, loss of charging, reduced power, stalling, or a no-start condition traced to the 48V system. Mercedes issued service communications and there are numerous owner comp… Repairs typically run $1,200-$4,500. Severity: high.
What is the 2021-2024 Mercedes-Benz E-Class MBUX / Instrument Cluster Black Screen, Rebooting, and Rear Camera Inoperative Due to Infotainment Software Faults?
Owners of 2021+ facelift E-Class cars frequently reported MBUX display freezes, black screens, spontaneous reboots, loss of audio/navigation, and backup camera malfunctions. Mercedes has issued software-related service information for MBUX and camera behavior, and NHTSA complaint… Repairs typically run $250-$2,200. Severity: medium.
Content on this page was compiled with AI assistance using NHTSA complaints, TSBs, owner reports, and public automotive data. While we strive for accuracy, this information may contain errors. Always verify repair procedures and specifications with your vehicle's service manual or a qualified mechanic.