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Mercedes-Benz S350Model year report

2012 Mercedes-Benz S350 Problems

Complaints
7filed with NHTSA
Median mileage
54,500miles, 7 complaints with mileage
Recalls
0campaigns on record
Trend
Not enough dataFewer than 15 complaints, too few for a reliable trend.

Sources: NHTSA records for the 2012 Mercedes-Benz S350 (complaints, recalls, investigations). Report an error

NHTSA recorded 7 consumer complaints for the 2012 Mercedes-Benz S350. The part named most often is engine, with 3 complaints (43% of the total), followed by fuel system (2) and transmission and drivetrain (2). 7 of the complaints include a mileage, and 14% of those were filed for vehicles with under 50,000 miles; the median is 54,500 miles. NHTSA lists 0 recall campaigns and 70 technical service bulletins for this model year. Engine complaints overlap with 6 technical service bulletins filed under the same part. Fuel system complaints overlap with 1 technical service bulletin 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

Engine: “I did some research on mercedes 3.0l diesel motors and there seems to be an issue with the seal failing about 50,000 miles causing the motor to leak oil and the seal as well as the oil cooler need to be replaced. It is such a common problem on the 3.0l diesel engines that when you call any repair shop the first thing they ask is if the car is a diesel. Also the seal replacement is all over the mercedes blogs saying the same issue on the 3.0l diesels. …”

NHTSA complaint #10928395, filed 2016-11, 54,500 miles

Fuel system: “Takata recall the vehicle slips into a limp mode while driving. This have happened several times. I'm taking it to the mb dealer this weekend. 11/16/2016. 57kmiles”

NHTSA complaint #10926405, filed 2016-11, 57,000 miles

Transmission and drivetrain: “While driving at freeway speeds car went into limp mode. Engine rmp were limited to 1500rpm and speed dropped to 25mph.this happened 3 times during week of 3/14/16 and again on 3/22/16. Had to make defensive emergency maneuver to steer the car away from the traffic lanes and stop on the side of the freeway. Was almost rear ended by a semi. Car had to be turned off and restarted to come back to normal driving mode. Car was taken to mercedes dealer and it was diagnosed to be a bad torque converter causing this limp mode. Dealer repaired the car by replacing the torque converter. …”

NHTSA complaint #10852448, filed 2016-03, 52,000 miles

Vehicle speed control: “The contact owns a 2012 mercedes benz S350. While driving approximately 65 MPH, the vehicle decelerated without warning. The contact then coasted over to the emergency lane and there were no warning lights illuminated. The vehicle restarted; however, the failure recurred multiple times. The vehicle was taken to the dealer for diagnostic testing. The technician diagnosed that the side charge air hose into the throttle actuator was torn and caused the loss of hose pressure. Both the left and right hose needed to be replaced. The vehicle was not repaired. …”

NHTSA complaint #10712016, filed 2015-04, 50,000 miles

Mileage when problems were reported

14% of the 7 complaints with a mileage were filed for vehicles with under 50,000 miles; the middle half falls between 52,000 and 57,000 miles.

0%0–100%10–2514%25–5086%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: 54,500 miles.

Complaints by year filed

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

2015201642019
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.

Recalls and investigations

NHTSA lists no recall campaigns for the 2012 Mercedes-Benz S350 in the data used here. A recall can apply to some vehicles of a model year and not others, so check a specific vehicle by 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. 70 on record; the latest 10 are shown.

See all 70 bulletins →

Other model years of the Mercedes-Benz S350

YearComplaintsMedian miRecallsCrash ★MPGScore (50 = typical)Trend
2012754,5000———Not enough data

All Mercedes-Benz S350 model years

Frequently asked questions

How many NHTSA complaints does the 2012 Mercedes-Benz S350 have?

NHTSA recorded 7 consumer complaints for the 2012 Mercedes-Benz S350 as of Oct 31, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.

What part of the 2012 Mercedes-Benz S350 is reported most often?

Engine is named most often, in 3 complaints (43% of the total), followed by fuel system with 2.

Has the 2012 Mercedes-Benz S350 been recalled?

NHTSA lists no recall campaigns for this model year in the data used here. To check a specific vehicle, enter its VIN at nhtsa.gov/recalls.

At what mileage are problems with the 2012 Mercedes-Benz S350 reported?

Among the 7 complaints that include a mileage, the median is 54,500 miles and the middle half falls between 52,000 and 57,000 miles; 14% 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.

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.