Skip to content
Mercedes-Benz E400Model year report

2018 Mercedes-Benz E400 Problems

Complaints
23filed with NHTSA
Median mileage
15,000miles, 7 complaints with mileage
Recalls
13campaigns on record
Trend
RisingComplaints filed in the last 3 full calendar years are at least 25% higher than in the 3 years before.
NHTSA crash rating
5 / 5stars overall, 4 rated versions
EPA fuel economy
22 mpgcombined, 3.0L 6-cyl RWD · 20 city / 26 hwy

Sources: NHTSA records for the 2018 Mercedes-Benz E400 (complaints, recalls, investigations), NHTSA crash tests, EPA fuel economy. Report an error

NHTSA recorded 23 consumer complaints for the 2018 Mercedes-Benz E400. The part named most often is other or unknown, with 6 complaints (26% of the total), followed by electrical system (4) and engine (3). 7 of the complaints include a mileage, and 100% of those were filed for vehicles with under 50,000 miles; the median is 15,000 miles. Of all complaints, 1 involved a crash, 2 a fire, according to the filers. NHTSA lists 13 recall campaigns and 223 technical service bulletins for this model year. Other or unknown complaints overlap with 11 technical service bulletins filed under the same part. Electrical system complaints overlap with 1 recall campaign and 75 technical service bulletins filed under the same part.

This model year has fewer than 25 complaints on record, so the numbers below can change a lot with a few new reports.

Which parts are reported most

Complaints can name more than one part, so the counts add up to more than the total. Select a part to see its complaints, recalls and bulletins.

Also reported: Exterior lighting (1), Forward collision avoidance (1), Lane departure (1), Body and structure (1), Tires (1), Vehicle speed control (1), Wheels (1).

Example complaints

Other or unknown: “On may 30, 2020, around 3 pm, my son was the driver and my wife and I were the passengers driving in jersey city, nj (USA). While changing lanes on the road, the car suddenly stopped functioning. All dashboard lights came on and it showed a car with zig zag lines and stated inoperable. We were in the middle of the road in a dangerous situations with cars going around us. The steering wheel froze and the brakes were not functioning. We tried to restart the car many times with the dashboard lights coming on and stating inoperable. …”

NHTSA complaint #11327065, filed 2020-06, 22,777 miles

Electrical system: “The digital dash, which shows my speed, mileage, engine temperature, rims and fuel level goes blank. Then comes on for a few seconds and goes dark again. Vehicle only has 43k miles. MB dealer said this is not uncommon condition with the 2018 mb e400. Car is not safe to drive. MB dealer wants $6,100.00 to replace the unit. A software reboot will not work.”

NHTSA complaint #11688398, filed 2025-09

Engine: “I was driving in the florida turnpike traveling from miami I stopped at a service station to go to the restroom and when I came back my car had a fire coming from the engine. I had to get the fire extinguisher from the gas station, opened the hood and put down the fire. The vehicle was stationary and the engine was not running. My concern was not just my safety but the fact that I was so close to the gas station. There was 0 warning and no erratic behaviour from the car before this.”

NHTSA complaint #11164363, filed 2019-01, 6,500 miles

Seat belts: “The driver-side seat belt retractor on my 2018 Mercedes-Benz E400 (W213) has failed to fully retract, leaving significant slack across the driver's chest and lap. An authorized Mercedes-Benz dealer has diagnosed the issue as a failed seat belt motor. This component is part of the vehicle's electronic PRE-SAFE system. Because the belt no longer retracts into its stowed position or maintains tension, the vehicle is in a state of non-compliance with Federal Motor Vehicle Safety Standard (FMVSS) No. 209 (Seat Belt Assemblies). …”

NHTSA complaint #11715242, filed 2026-02

Mileage when problems were reported

100% of the 7 complaints with a mileage were filed for vehicles with under 50,000 miles; the middle half falls between 6,500 and 21,000 miles.

43%0–1057%10–250%25–500%50–750%75–1000%100–1500%150+
Share of complaints by mileage when the problem was reported, in thousands of miles (7 complaints with mileage). Red bars: under 50,000 miles. Bucket widths differ. Median: 15,000 miles.

Complaints by year filed

Trend: rising. Complaints filed in the last 3 full calendar years are at least 25% higher than in the 3 years before.

20182019202020212022202342024202520264
Complaints by year the complaint was filed with NHTSA. Red bars: the last 3 full calendar years used for the trend. The current year (2026) is partial.

Crash test ratings

NHTSA's 5-Star Safety Ratings for the 2018 Mercedes-Benz E400. Frontal results are shown driver / passenger; rollover shows the star rating and NHTSA's estimated risk of rolling over in a single-vehicle crash.

VersionOverallFrontalSideSide poleRollover
E-Class · sedan 4WD★★★★★5 / 5555 · 9.7% risk
E-Class · wagon 4WD★★★★★5 / 5555 · 9.7% risk
E-Class · sedan RWD★★★★★5 / 5555 · 9.7% risk
E-Class · wagon RWD★★★★★5 / 5555 · 9.7% risk

Driver aids listed by NHTSA for the 2018 model year: forward collision warning standard, lane departure warning optional, automatic emergency braking not available.

Neighbouring years: 2017: same overall rating. A redesign between years can change both the car and the test.

Source: NHTSA New Car Assessment Program (5-Star Safety Ratings), nhtsa.gov/ratings.

Fuel economy and running cost

EPA ratings for each 2018 Mercedes-Benz E400 version. Annual fuel cost is the EPA's estimate at its current fuel prices for 15,000 miles a year (55% city driving).

VersionEngineTransmissionCityHwyComb.Fuel / yr
E400 Convertible RWD3.0L 6-cyl9-speed automatic202622$3,750
E400 Coupe RWD3.0L 6-cyl9-speed automatic202622$3,750

Source: U.S. EPA and Department of Energy, fueleconomy.gov. Ratings are for comparing vehicles; real-world mileage varies with driving and conditions.

Recalls and investigations

See all 13 recalls for the 2018 Mercedes-Benz E400 → · Check a VIN at nhtsa.gov/recalls

Technical service bulletins

TSBs are manufacturer notes to dealers about known repair procedures. They are not recalls and do not by themselves mean a vehicle has a fault. 223 on record; the latest 10 are shown.

See all 223 bulletins →

Other model years of the Mercedes-Benz E400

YearComplaintsMedian miRecallsCrash ★MPGScore (50 = typical)Trend
20182315,00013522—Rising
2017203,5008523—Falling
20163440,0007423Not compared (fewer than 3 comparable model years)Falling
20151515,0007423—Falling

All Mercedes-Benz E400 model years

Frequently asked questions

How many NHTSA complaints does the 2018 Mercedes-Benz E400 have?

NHTSA recorded 23 consumer complaints for the 2018 Mercedes-Benz E400 as of Oct 31, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.

What part of the 2018 Mercedes-Benz E400 is reported most often?

Other or unknown is named most often, in 6 complaints (26% of the total), followed by electrical system with 4.

Has the 2018 Mercedes-Benz E400 been recalled?

NHTSA lists 13 recall campaigns for this model year. To check a specific vehicle, enter its VIN at nhtsa.gov/recalls.

How did the 2018 Mercedes-Benz E400 do in NHTSA crash tests?

NHTSA's 5-Star Safety Ratings give the 2018 Mercedes-Benz E400 5 out of 5 stars overall, across 4 rated versions (body style and drive). Ratings from different model years are only comparable when the vehicle was not redesigned in between.

What gas mileage does the 2018 Mercedes-Benz E400 get?

The EPA rates the 2018 Mercedes-Benz E400 (E400 Convertible, 3.0L 6-cyl) at 22 mpg combined, 20 city and 26 highway, with an estimated annual fuel cost of $3,750 at 15,000 miles a year. Other engine and drive versions are rated differently.

At what mileage are problems with the 2018 Mercedes-Benz E400 reported?

Among the 7 complaints that include a mileage, the median is 15,000 miles and the middle half falls between 6,500 and 21,000 miles; 100% were filed for vehicles with under 50,000 miles.

About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 31, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate. Crash ratings are from NHTSA’s New Car Assessment Program. Fuel economy is from the EPA and DOE (fueleconomy.gov).

Complaint counts come from NHTSA’s public complaint database; we count each complaint once. The source records for this vehicle are on nhtsa.gov. Scores and trends are our own summaries of that data, described in the methodology. This page is not legal, safety or repair advice: for a specific vehicle, check its VIN at nhtsa.gov/recalls and ask a qualified mechanic. See an error? Tell us.