1997 Mercedes-Benz E300 Diesel: MPG and fuel economy
The 1997 Mercedes-Benz E300 Diesel is rated by the U.S. Environmental Protection Agency at 26 combined MPG, with 23 MPG in the city and 30 MPG on the highway. That puts it well above the average for cars in the Midsize Cars class in the same model year.
This page collects every fuel-economy figure the EPA publishes for the 1997 Mercedes-Benz E300 Diesel. Below you will find the headline combined, city, and highway MPG, the estimated annual fuel cost at three different driving levels, the tailpipe CO₂ emissions, and a full breakdown of the engine and drivetrain. If you want to know whether this generation got more or less efficient over the years, the year-over-year table further down covers every model year the EPA has rated.
Key takeaways
- Returns 33% better combined MPG than the average car in the Midsize Cars class for the 1997 model year (19.6 MPG class average).
- The most efficient car in the Midsize Cars class for the 1997 model year is the Volkswagen Passat at 36 MPG.
- EPA estimates this car costs around $4,750 more in fuel over five years than an average new vehicle of the same model year.
Fuel economy at a glance
These are the EPA's official ratings for the 1997 Mercedes-Benz E300 Diesel. The numbers come from a standardised laboratory test cycle and are the same figures that appear on the window sticker of every new car. Real-world mileage varies with driving style, weather, fuel quality, and how heavily loaded the car is.
Combined MPG is a 55/45 weighted blend of the city and highway test cycles. The EPA uses it as the single number you can compare across the entire dataset, including hybrids and EVs (which use the equivalent MPGe figure).
| Combined MPG | 26 MPG |
| City MPG | 23 MPG |
| Highway MPG | 30 MPG |
| Annual fuel cost | $3,100 |
| Tailpipe CO₂ | 392 g/mi |
| Fuel type | Diesel |
How the 1997 Mercedes-Benz E300 Diesel compares
The 1997 Mercedes-Benz E300 Diesel returns 26 combined MPG. Cars in the Midsize Cars class for the same model year average 19.6 MPG, which puts this car ahead of the class average by about 33%.
The most efficient car in the Midsize Cars class for the 1997 model year is the Volkswagen Passat at 36 MPG. The bar chart below puts the Mercedes-Benz E300 Diesel alongside the class best and the class average so you can see the full picture.
For broader context, the average new car of the 1997 model year (across all classes) returns 18.9 MPG. Larger vehicles pull the all-cars average down, so do not use that figure on its own to judge a small car or a hybrid. The full list of the most efficient cars of the 1997 model year is on its own page.
Annual fuel cost across driving patterns
The headline annual fuel cost the EPA publishes assumes 15,000 miles of driving per year and a fuel mix of 55% city and 45% highway. The dollar figure is calculated using the EPA's current reference price for diesel, which is $5.40/gallon. EPA updates that reference periodically rather than tracking live pump prices, so treat it as a window-sticker estimate rather than today's pump number.
The table below scales the EPA's number to three common driving patterns. The combined MPG and the reference fuel price stay constant, only the annual mileage changes. To get a current-prices estimate, take your local gas price and multiply by 576.9 gallons (the car's annual consumption at the rated MPG).
| Driving pattern | Estimated annual fuel cost |
|---|---|
| Light driver, 7,500 miles per year | $1,550 |
| Average driver, 15,000 miles per year | $3,100 |
| Heavy driver, 25,000 miles per year | $5,167 |
Year-over-year MPG for the Mercedes-Benz E300 Diesel
The EPA has rated the Mercedes-Benz E300 Diesel across 3 model years, from 1995 Mercedes-Benz E300 Diesel through 1997 Mercedes-Benz E300 Diesel. The numbers below are the best combined MPG figure the EPA published for each year, which lets you see when the car was at its most efficient and how recent generations stack up.
Combined MPG has stayed in roughly the same range across the run. The peak rating came with the 1996 Mercedes-Benz E300 Diesel at 27 MPG.
| Year | Combined MPG | Open year page |
|---|---|---|
| 1997 | 26 MPG | this page |
| 1996 | 27 MPG | 1996 Mercedes-Benz E300 Diesel |
| 1995 | 25 MPG | 1995 Mercedes-Benz E300 Diesel |
Compare against other Midsize Cars for 1997
If you are cross-shopping the 1997 Mercedes-Benz E300 Diesel, the most useful comparison is against the other cars in the Midsize Cars class for the same model year. The list below shows the highest-MPG peers, ranked from most to least efficient. Click any of them to open its full page.
The Volkswagen Passat leads this group at 36 MPG, 10 MPG ahead of the 1997 Mercedes-Benz E300 Diesel.
Specifications
The 1997 Mercedes-Benz E300 Diesel runs a 3-liter 6-cylinder engine paired with a automatic 5-spd, sending power through rear-wheel drive.
Engine, transmission, and drivetrain together drive most of the variation in fuel economy across trims. A larger engine moves the car with less effort but burns more fuel. A turbo lets a small engine punch above its weight, often without much MPG penalty. All-wheel drive adds traction and weight, and usually costs a couple of MPG compared with two-wheel drive of the same engine.
- Vehicle class
- Midsize Cars
- Engine
- 3L 6-cylinder
- Transmission
- Automatic 5-spd
- Drivetrain
- Rear-Wheel Drive
- Fuel type
- Diesel
- Annual petroleum use
- 13.7 barrels per year
Common questions about the 1997 Mercedes-Benz E300 Diesel
Quick answers to the questions people most often search for when looking up the 1997 Mercedes-Benz E300 Diesel.
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Is the 1997 Mercedes-Benz E300 Diesel fuel efficient?
Yes. The 1997 Mercedes-Benz E300 Diesel returns 26 combined MPG, which beats the average car in the Midsize Cars class for the same model year by about 33%. -
What MPG does the 1997 Mercedes-Benz E300 Diesel get?
The EPA rates the 1997 Mercedes-Benz E300 Diesel at 26 combined MPG, 23 MPG in city driving, and 30 MPG on the highway. Real-world numbers depend on your driving style, the weather, and how loaded the car is. -
How much does it cost to fuel a 1997 Mercedes-Benz E300 Diesel per year?
The EPA estimates an annual fuel cost of $3,100 for the 1997 Mercedes-Benz E300 Diesel. That figure assumes 15,000 miles of driving per year, a 55% city and 45% highway split, and the EPA's published average fuel price for the rated fuel grade. -
What fuel does the 1997 Mercedes-Benz E300 Diesel use?
The EPA lists the 1997 Mercedes-Benz E300 Diesel as running on diesel. Using a different grade than the manufacturer specifies can affect fuel economy and engine longevity. -
Has the Mercedes-Benz E300 Diesel become more fuel efficient over time?
Combined MPG has stayed close to flat across the run. Both the earliest (1995 Mercedes-Benz E300 Diesel, 25 MPG) and most recent (1997 Mercedes-Benz E300 Diesel, 26 MPG) versions sit in the same range. -
How much CO₂ does the 1997 Mercedes-Benz E300 Diesel emit?
Tailpipe CO₂ emissions are 392 g/mi. Multiplied across a typical year of driving (15,000 miles) that works out to about 5,873 kilograms of CO₂. -
What is the difference between the city and highway MPG of the 1997 Mercedes-Benz E300 Diesel?
City driving returns 23 MPG and highway driving returns 30 MPG, a gap of 7 MPG. A spread that wide is typical of cars with conventional automatic or manual transmissions, where stop-start city traffic eats more fuel than a steady highway cruise. -
What engine is in the 1997 Mercedes-Benz E300 Diesel?
The 1997 Mercedes-Benz E300 Diesel has a 3-liter 6-cylinder engine (EPA description: (FFS)). -
What transmission and drivetrain does the 1997 Mercedes-Benz E300 Diesel have?
The 1997 Mercedes-Benz E300 Diesel comes with a automatic 5-spd transmission and rear-wheel drive. -
How does the 1997 Mercedes-Benz E300 Diesel compare to the best car in its class?
The most efficient car in the Midsize Cars class for the 1997 model year is the Volkswagen Passat at 36 combined MPG. The Mercedes-Benz E300 Diesel returns 26 MPG, a gap of 10 MPG. If you are comparing on fuel economy alone, the class leader is worth a look.
Source: U.S. EPA fuel economy dataset. Annual fuel cost figures assume 15,000 miles of driving per year and a 55% city, 45% highway split. Real-world mileage varies with driving conditions, vehicle maintenance, fuel quality, and driver behaviour.