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Mercedes-Benz R350Model year report

2012 Mercedes-Benz R350 Problems

Complaints
8filed with NHTSA
Median mileage
61,500miles, 4 complaints with mileage
Recalls
32 do-not-drive
Trend
Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA crash rating
—no overall rating published
EPA fuel economy
18 mpgcombined, 3.5L 6-cyl 4WD · 16 city / 21 hwy

Sources: NHTSA records for the 2012 Mercedes-Benz R350 (complaints, recalls, investigations), EPA fuel economy. Report an error

NHTSA recorded 8 consumer complaints for the 2012 Mercedes-Benz R350. The part named most often is air bags, with 5 complaints (63% of the total), followed by brakes (1) and electrical system (1). 4 of the complaints include a mileage, and 25% of those were filed for vehicles with under 50,000 miles; the median is 61,500 miles. NHTSA lists 3 recall campaigns (2 marked do-not-drive) and 52 technical service bulletins for this model year. Air bags complaints overlap with 1 recall campaign covering the inflator module and 2 technical service bulletins filed under the same part. Brakes complaints overlap with 2 recall campaigns covering the vacuum and 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

Air bags: “Takata recall I received a post card in the mail from tk holdings stating to contact the dealer for a free repair. I have contacted the dealer and they state that the airbags are on back order. The issue is not being resolved in a timely manner”

NHTSA complaint #11041900, filed 2017-11

Brakes: “The contact owns a 2012 Mercedes-Benz R350. The contact received notification of NHTSA Campaign Number: 22V315000 (Service Brakes, Hydraulic) however, the part to do the recall repair was unavailable. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the issue. The contact stated that the rear end of the vehicle was making a grinding sound while the brake pedal was depressed. …”

NHTSA complaint #11472772, filed 2022-07, 185,000 miles

Electrical system: “Takata recall - while driving along a county street my vehicle completely stalled. I put in park and it started and went approximately a 1/2 of a mile and stalled again. It did this twice more before I got home where I shut it off and called a tow company to take it to the shop. My service advisor call and told me that the wiring hones to the engine burned up.”

NHTSA complaint #11082046, filed 2018-03, 65,000 miles

Engine: “The contact owns a 2012 mercedes benz e350. The contact stated that the engine stalled without warning. The vehicle was taken to the dealer, who performed a diagnostic that detected sludge in the engine. The engine was replaced however, the failure was not corrected and the vehicle continued to sporadically stall. The vehicle was taken back to the dealer for further inspection. The manufacturer was made aware of the failure. The approximate failure and current mileage was 34,000.”

NHTSA complaint #10579554, filed 2014-04, 34,000 miles

Mileage when problems were reported

25% of the 4 complaints with a mileage were filed for vehicles with under 50,000 miles; the middle half falls between 58,000 and 65,000 miles.

0%0–100%10–2525%25–5050%50–750%75–1000%100–15025%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: 61,500 miles.

Complaints by year filed

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

201420173201820192022
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 2012 Mercedes-Benz R350 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
R350 4matic 4WD3.5L 6-cyl7-speed automatic162118$4,550

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

Recall details for the 2012 Mercedes-Benz R350 → · 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. 52 on record; the latest 10 are shown.

See all 52 bulletins →

Other model years of the Mercedes-Benz R350

YearComplaintsMedian miRecallsCrash ★MPGScore (50 = typical)Trend
2012861,5003—18—Not enough data
20111868,1003—16—Rising
20101378,5003—16—Not enough data
20091575,0003—16—Rising
20083590,0002—17Not compared (fewer than 3 comparable model years)Falling
20074775,0002—16Not compared (before 2008)Stable
20069980,0002—16Not compared (before 2008)Falling

All Mercedes-Benz R350 model years · Best and worst years by complaints

Frequently asked questions

How many NHTSA complaints does the 2012 Mercedes-Benz R350 have?

NHTSA recorded 8 consumer complaints for the 2012 Mercedes-Benz R350 as of Nov 1, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.

What part of the 2012 Mercedes-Benz R350 is reported most often?

Air bags is named most often, in 5 complaints (63% of the total), followed by brakes with 1.

Has the 2012 Mercedes-Benz R350 been recalled?

NHTSA lists 3 recall campaigns for this model year, 2 of them with a do-not-drive advisory. To check a specific vehicle, enter its VIN at nhtsa.gov/recalls.

What gas mileage does the 2012 Mercedes-Benz R350 get?

The EPA rates the 2012 Mercedes-Benz R350 (R350 4matic, 3.5L 6-cyl) at 18 mpg combined, 16 city and 21 highway, with an estimated annual fuel cost of $4,550 at 15,000 miles a year. Other engine and drive versions are rated differently.

At what mileage are problems with the 2012 Mercedes-Benz R350 reported?

Among the 4 complaints that include a mileage, the median is 61,500 miles and the middle half falls between 58,000 and 65,000 miles; 25% were filed for vehicles with under 50,000 miles.

About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Nov 1, 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.