2021 Mercedes-Benz E-Class Common Problems & Defect Telemetry
Authoritative defect intelligence synthesized from 20 verified NHTSA owner complaints, 0 federal safety recalls, and interquartile failure mileage telemetry.
The 2021 Mercedes-Benz E-Class receives a 8.4/10 MazicBay Reliability Index based on 20 verified NHTSA federal complaints and 0 safety recalls. The primary reported failure mode is Engine Stalling, Oil Consumption & Cooling Defect Reports with a median failure point at 25,400 miles (IQR: 14,100 – 36,700 mi). Out-of-warranty repairs benchmark at $950 – $3,200 .
4.4 complaints / 10k sold
Verified US federal records
Crash, fire & stall audit
0 Active / Free Remedies
Top Reported Problem Clusters (5)
Engine Stalling, Oil Consumption & Cooling Defect Reports
- Engine sudden stall / hesitation while driving
- Abnormal oil burning / consumption
- Check Engine Light (MIL) flashing
- Engine overheating / coolant loss
“Engine misfires, lower engine power, and a lit check engine/Malfunction Indicator Lamp. Mercedes-Benz issued an Emission Service Campaign (No. 2021070006, internal code 21P1590208) to replace out-of-spec ignition coils on 657 vehicles from model year 2021, including the E-Clas...”
“Engine keeps having a misfire that Mercedes put a TSB out for and once the misfire happen I cause the vehicle to go in a limp mode which causes the vehicle to loose power happened to me in the freeway. The car had 54K miles and Mercedes refused to repair the issue as the engin...”
“My 2021 Mercedes-Benz E350 (VIN ... ) developed a serious engine issue involving cylinder misfire and check engine light. The dealer diagnosed it as a leaking exhaust valve on cylinder 4, related to TSB LI01.30-P-072328, which documents valve seat wear in M260 engines. This is...”
Electrical Parasitic Drain, Infotainment & Harness Reports
- Unexplained battery drain after sitting overnight
- Infotainment display / instrument cluster blackouts
- Accessory malfunction / alternator fault warnings
“Vehicle: 2021 Mercedes-Benz E350 Sedan (W213) VIN: ... While operating the vehicle, the diagnostic system displayed the fault code P240200 related to the Evaporative Emission Control System (EVAP). The warning message indicated a “positive short circuit” in the fuel vapor leak...”
“1) Rear view camera sometimes working, some times not working. (Message reads “system inoperative “ 2) Forward view camera also affected. 3) display shown “12V battery low in battery “ 4) Not long ago, just had vehicle suddenly vibrating vigorously while backing up from parkin...”
“FIRE FIRE FIRE Information light came on just saying 12 Volt Battery. I sat in the car letting it idle for about 3 minutes. It began to smoke and then burst into flames. I called 911 got the fire department here but by the time they were here there was not much left. The car e...”
Transmission Hesitation, Hard Shifting & Slipping Reports
- Hard gear shifts / delayed engagement into Drive/Reverse
- Transmission shudder / jerking under acceleration
- Transmission slipping between gears
“Engine misfires, lower engine power, and a lit check engine/Malfunction Indicator Lamp. Mercedes-Benz issued an Emission Service Campaign (No. 2021070006, internal code 21P1590208) to replace out-of-spec ignition coils on 657 vehicles from model year 2021, including the E-Clas...”
“With the car only have about 15,000 miles the transmission has failed . I have seen there have been recalls of other models with similar complaints of transmission failure .”
“The Mercedes E350, with 22,000 miles suffered a catastrophic transmission failure while driving on the highway. I managed to exit the highway but the car could not be moved and left me stranded.”
Fuel Pump Pressure Loss & Fuel Delivery Defect Reports
- Sudden loss of propulsion power at highway speeds
- Extended engine cranking / failure to restart
- Fuel odor near fuel tank / engine bay
“Vehicle: 2021 Mercedes-Benz E350 Sedan (W213) VIN: ... While operating the vehicle, the diagnostic system displayed the fault code P240200 related to the Evaporative Emission Control System (EVAP). The warning message indicated a “positive short circuit” in the fuel vapor leak...”
“The contact owns a 2021 Mercedes-Benz E350. The contact stated while driving at approximately 60 MPH, the check engine warning light illuminated, and the vehicle decelerated to 30 MPH. The vehicle was taken to the local mechanic who diagnosed that the fuel pump was faulty and ...”
Service Brakes, ABS Actuator & Master Cylinder Reports
- Spongy or hard brake pedal travel
- ABS / Brake warning light illuminated
- Extended stopping distance / pedal vibration
“The contact owns a 2021 Mercedes-Benz E350. The contact stated that while parking the vehicle the emergency brake independently seized. The contact stated that the vehicle abruptly stopped. The vehicle would not drive forward or backward. The contact contacted the dealer and a...”
“After the car sits for three or more days, brakes locks up. It takes lots of power to get the brakes to release. It’s a safety concern as the car is parked in the garage with not enough room to maneuver. We never had any car which locks the brakes in this manner. Took it to MB...”
Pre-Purchase Inspection Checklist for 2021 Mercedes-Benz E-Class
Before purchasing a used 2021 Mercedes-Benz E-Class, perform the following targeted inspections based on reported federal defect patterns:
Scan the OBD-II port under the dash for pending freeze-frame codes (e.g. P0300 misfires, P0087 fuel rail pressure, P0420 catalytic efficiency).
Test vehicle at low-speed stop-and-go and highway merges. Check for delayed reverse engagement or gear shift shudder between 2nd and 3rd gears.
Verify that all 0 NHTSA safety recall campaigns have been performed by an authorized dealership using the VIN.
Ensure the instrument cluster, center screen, and auxiliary charging ports operate with stable 12.0V–14.4V alternator voltage.
Defect & Reliability Q&A: 2021 Mercedes-Benz E-Class
Is the 2021 Mercedes-Benz E-Class a reliable used car?
The 2021 Mercedes-Benz E-Class earns a 8.4/10 MazicBay Reliability Index based on 20 federal owner reports. Vehicles maintained under factory service schedules exhibit strong longevity past 150,000 miles.
What is the most frequent defect reported on the 2021 Mercedes-Benz E-Class?
The leading complaint category is Engine Stalling, Oil Consumption & Cooling Defect Reports, with a median failure point around 25,400 miles (IQR: 14,100 – 36,700 mi).
Are there free recall repairs available for the 2021 Mercedes-Benz E-Class?
Yes, the NHTSA records 0 safety recall campaign(s) for this model year. All safety recalls are performed 100% free of charge by authorized franchise dealerships regardless of vehicle warranty status.