1991 Mercedes-Benz 300D 2.5 TurboFuel Economy & MPG Ratings
Diesel Compact CarsRear-Wheel Drive
City
23
MPG
Highway
30
MPG
Combined
26
MPG
Real-World MPG
Based on 6 owner reports via EPA fueleconomy.gov
32.0MPG average+23.1% vs EPA label
EPA combined: 26 MPG · Owner reported avg: 32.0 MPG
Range: 29–37 MPG
Driving mix: City 36% / Highway 64%
Source: EPA fueleconomy.gov “Your MPG” owner submissions. Real-world results vary by driver behavior, conditions, and equipment.
Owner reported MPG for this vehicle averages 32.0 real world MPG based on 6 owner reports. EPA combined rating is 26 MPG.
Trim Comparison
Automatic 4-spd
Diesel Diesel
City
23
Hwy
30
Comb
26
Fuel cost: $3,250/yr
| Trim | Engine | City | Hwy | Combined | Fuel Cost/yr |
|---|---|---|---|---|---|
| Automatic 4-spd | Diesel Diesel | 23 | 30 | 26 | $3,250 |
Annual Fuel Cost
$3,250
Based on gasoline at $3.67/gal, 15,000 miles/year
5-Year Fuel Savings
$-4,250
vs. average new vehicle
EPA Fuel Economy Score: -1/10
GHG Score: -1/10
Environment
- CO₂ Tailpipe Emissions
- 392 g/mile
- Annual Petroleum Consumption
- 13.7 barrels
Specifications
- Engine
- 2.5L 5-cyl
- Transmission
- 4-speed Automatic
- Drivetrain
- RWD
- Body Style
- Sedan
- GVWR
- Class 1 (≤6,000 lbs)
Source: EPA fuel economy data & NHTSA vPIC. Specifications reflect the most common trim configuration.
Engine & Efficiency Details
Source: EPA fueleconomy.gov
- Engine Size
- 2.5L, 5-cylinder
- Induction Type
- (DSL,TRBO) (NO-CAT)
- Fuel Type
- Diesel
Annual Fuel Cost by State
Prices as of week ending May 18, 2026 · Source: EIA
National AvgEPA default
$4.490/gal$2,590/yr
California
$5.957/gal$3,437/yr
Texas
$3.888/gal$2,243/yr
Florida
$4.136/gal$2,386/yr
New York
$4.522/gal$2,609/yr
Ohio
$4.510/gal$2,602/yr
Washington
$5.591/gal$3,226/yr
Colorado
$4.618/gal$2,664/yr
Minnesota
$4.344/gal$2,506/yr
Massachusetts
$4.448/gal$2,566/yr
| State | Gas Price | Annual Cost | vs. National Avg |
|---|---|---|---|
| National AvgEPA default | $4.490/gal | $2,590/yr | — |
| California | $5.957/gal | $3,437/yrHIGHEST | +$847 |
| Texas | $3.888/gal | $2,243/yrLOWEST | $-347 |
| Florida | $4.136/gal | $2,386/yr | $-204 |
| New York | $4.522/gal | $2,609/yr | +$19 |
| Ohio | $4.510/gal | $2,602/yr | +$12 |
| Washington | $5.591/gal | $3,226/yr | +$636 |
| Colorado | $4.618/gal | $2,664/yr | +$74 |
| Minnesota | $4.344/gal | $2,506/yr | $-84 |
| Massachusetts | $4.448/gal | $2,566/yr | $-24 |
Calculated at 15,000 miles/year (EPA standard assumption) using 26 MPG combined. Regular gasoline prices. Actual costs vary.
Related
Mercedes-Benz 300D 2.5 Turbo MPG History
See how this model's fuel economy changed by year