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Mercedes-Benz S 450Model year report

2018 Mercedes-Benz S 450 Problems

Complaints
7filed with NHTSA
Median mileage
44,913miles, 4 complaints with mileage
Recalls
9campaigns on record
Trend
Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA crash rating
—no overall rating published
EPA fuel economy
22 mpgcombined, 3.0L 6-cyl RWD · 19 city / 28 hwy

Sources: NHTSA records for the 2018 Mercedes-Benz S 450 (complaints, recalls, investigations), EPA fuel economy. Report an error

NHTSA recorded 7 consumer complaints for the 2018 Mercedes-Benz S 450. The part named most often is brakes, with 2 complaints (29% of the total), followed by forward collision avoidance (2) and other or unknown (1). 4 of the complaints include a mileage, and 75% of those were filed for vehicles with under 50,000 miles; the median is 44,913 miles. NHTSA lists 9 recall campaigns and 147 technical service bulletins for this model year. Brakes complaints overlap with 1 recall campaign covering the pads and 2 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.

Example complaints

Brakes: “I’m reporting this safety concern and seeking advisement from those more knowledgeable than myself on this issue. Recently, as I attempted to actuate the brake of my vehicle. My right foot was entangled with the brake pedal as I moved it from the acceleration pedal to the brake pedal in observance of a “Stop Sign.” I barely avoided what surely would have been a catastrophic collision with another vehicle. The incident occurred in a split second. The shoe of my right foot was entangled with the lower right corner of the underside of the brake pedal, which has a protruding sharp thin metal edge. …”

NHTSA complaint #11509192, filed 2023-02

Other or unknown: “I was driving on highway on 7/26 Friday in exit lane when my panoramic sunroof exploded and shattered on me while driving. It sounded like a shogun. Some of the glass came in on me and other part flew out vehicle causing paint damage. I inspected car there was no impact from anything (ie rock, branch etc). It was a clear sunny dry day no vehicles in front that would have kicked up an object no impact whatsoever. I made to my house 3 miles away and there is no impact after inspection i have insurance adjuster coming Monday 7/29. …”

NHTSA complaint #11604856, filed 2024-07

Mileage when problems were reported

75% of the 4 complaints with a mileage were filed for vehicles with under 50,000 miles; the middle half falls between 40,000 and 49,826 miles.

25%0–100%10–2550%25–500%50–7525%75–1000%100–1500%150+
Share of complaints by mileage when the problem was reported, in thousands of miles (4 complaints with mileage). Red bars: under 50,000 miles. Bucket widths differ. Median: 44,913 miles.

Complaints by year filed

Fewer than 15 complaints, too few for a reliable trend.

201720192023320242025
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.

Fuel economy and running cost

EPA ratings for each 2018 Mercedes-Benz S 450 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
S450 RWD3.0L 6-cyl9-speed automatic192822$3,750
S450 4matic 4WD3.0L 6-cyl9-speed automatic182822$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 9 recalls for the 2018 Mercedes-Benz S 450 → · 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. 147 on record; the latest 10 are shown.

See all 147 bulletins →

Other model years of the Mercedes-Benz S 450

YearComplaintsMedian miRecallsCrash ★MPGScore (50 = typical)Trend
2018744,9139—22—Not enough data

All Mercedes-Benz S 450 model years

Frequently asked questions

How many NHTSA complaints does the 2018 Mercedes-Benz S 450 have?

NHTSA recorded 7 consumer complaints for the 2018 Mercedes-Benz S 450 as of Oct 27, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.

What part of the 2018 Mercedes-Benz S 450 is reported most often?

Brakes is named most often, in 2 complaints (29% of the total), followed by forward collision avoidance with 2.

Has the 2018 Mercedes-Benz S 450 been recalled?

NHTSA lists 9 recall campaigns for this model year. To check a specific vehicle, enter its VIN at nhtsa.gov/recalls.

What gas mileage does the 2018 Mercedes-Benz S 450 get?

The EPA rates the 2018 Mercedes-Benz S 450 (S450, 3.0L 6-cyl) at 22 mpg combined, 19 city and 28 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 S 450 reported?

Among the 4 complaints that include a mileage, the median is 44,913 miles and the middle half falls between 40,000 and 49,826 miles; 75% were filed for vehicles with under 50,000 miles.

About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 27, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate. 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.