Home / MERCEDES BENZ / E400

Mercedes Benz E400 Problems

The Mercedes-Benz E400 was a twin-turbo V6 variant of the E-Class offered from 2015 to 2018, positioned between the base E300 and the AMG E43/E53 performance models. Producing 329 horsepower from a 3.0L biturbo V6, the E400 delivered strong performance with refinement appropriate for the E-Class. With 158 complaints and zero deaths on record, the E400 offered a compelling blend of power and luxury during its production run.

158
Total Complaints
22
Total Recalls
3
Model Years
0
Reported Deaths

Common Problem Categories

Air Bags 92
Steering 10
Electrical System 10
Unknown Or Other 8
Service Brakes 6

Complaints by Model Year

All Model Years

Year ↓ Complaints Recalls Crashes Fires Rating
2017 44 8 0 0 Average
2016 78 7 4 0 Average
2015 36 7 6 0 Average

Mercedes Benz E400 Years to Avoid

The 2016 E400 accumulated the most complaints as a transition year between generations, with issues including transmission shudder during low-speed maneuvers, COMAND infotainment freezing, and air suspension problems on equipped models. Some owners reported unexpected battery drain and electrical faults.

Best Mercedes Benz E400 Years

The 2015 E400 represents the refined end of the W212 generation with proven reliability. The twin-turbo V6 had matured by this point, and major systems functioned reliably. A certified pre-owned 2015 E400 offers good value with the reassurance of warranty coverage.

Frequently Asked Questions

Why was the E400 discontinued?

Mercedes replaced the E400 designation with E450 when it transitioned from the M276 twin-turbo V6 to the M256 inline-six engine. The E450 offered similar power with improved efficiency.

Is the E400 twin-turbo V6 reliable?

The M276 V6 is generally reliable. It requires quality synthetic oil and adherence to service intervals. Some examples experienced thermostat and water pump failures, which are straightforward to address.

How does the E400 compare to the E450?

The E400's twin-turbo V6 produces 329 hp versus the E450's 362 hp. The E450 also adds mild hybrid technology for better efficiency. Performance is similar, with the E450 having a slight edge.

Is the E400 expensive to maintain?

Maintenance costs are typical for Mercedes, running ,500-2,500 annually. The V6 requires more complex servicing than four-cylinder models. Air suspension equipped cars have higher potential repair costs.