The Mercedes-Benz 350 does 21 mpg combined (19 city, 23 highway), which works out to about $1,829 a year in fuel at $3.20 a gallon and 12,000 miles. Against other V6 cars it sits above the average of 19.9 mpg.
Every Mercedes-Benz 350 engine, compared
The Mercedes-Benz 350 was rated in a single specification, so its gas mileage does not vary by version — only by model year. Yearly cost assumes 12,000 miles at $3.20 a gallon.
| Engine | Combined | City / Highway | Years | Fuel per year |
|---|---|---|---|---|
| 3.5L 6-cyl | 19 / 23 | 1990–1991 | $1,829 |
What that actually costs
The Mercedes-Benz 350 burns a gallon every 21 miles, so 12,000 miles takes about 571 gallons a year. At $3.20 that is what the table below adds up to.
| Measure | Value |
|---|---|
| Cost per mile | $0.152 |
| Fuel per year | $1,829 |
| Fuel over five years | $9,145 |
| Against other V6 cars | −$101 a year |
| EPA's own estimate | $3,700 a year |
City or highway — who is this car for
The Mercedes-Benz 350 gives up 4 mpg the moment you leave the motorway — 23 out there against 19 in town, a 21% drop worth $351 a year. A wide gap punishes stop-and-start traffic; a narrow one means the car doesn't care where you drive it.
| Measure | Value | Reading |
|---|---|---|
| City | 19 mpg | $2,021 a year if you only drive in town |
| Highway | 23 mpg | $1,670 a year if you mostly commute |
| Gap | +4 mpg (21%) | Typical for its type |
How the 350 changed over the years
Combined figure across the 2 model years the 350 was rated in, all of them at 21 mpg.
| Model year | Combined | City / Highway | Engines offered | Fuel per year |
|---|---|---|---|---|
| 1991 | 19 / 23 | 1 | $1,829 | |
| 1990 | 19 / 23 | 1 | $1,829 |
MPG is a number. Dollars per year is the answer.
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How we count
This page rests on 2 EPA ratings of the Mercedes-Benz 350 — 1 engine across 1990–1991. The mileage is EPA's laboratory figure, unchanged; the yearly bill is ours, at 12,000 miles and $3.20 a gallon, against EPA's own estimate of $3,700. Full method.
Frequently asked questions
What mpg does the Mercedes-Benz 350 get?
21 mpg combined on average — 19 in the city and 23 on the highway, per EPA ratings across 1990–1991.
How much does a Mercedes-Benz 350 cost in fuel per year?
About $1,829 at 12,000 miles and $3.20 a gallon — roughly $9,145 over five years, or 0.152 dollars a mile.
Which 350 engine is the most economical?
The 3.5L 6-cyl at 21 mpg.
Is the 350 good on fuel compared with similar cars?
Against other V6 cars it sits above the average of 19.9 mpg, computed across 4940 ratings.
Are these real-world 350 figures?
No — they are EPA laboratory ratings, the same ones printed on the window sticker, and EPA's own annual fuel estimate for the Mercedes-Benz 350 is $3,700 against the $1,829 we compute at 12,000 miles. Expect a little worse in practice: the spread between the city and highway figures is smaller than the spread between two drivers of the same one.
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