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Mercedes-Benz 420 MPG

EPA fuel economy for 8 Mercedes-Benz 420 trims sold from 1986 to 1991. Best ever: 15 MPG (1991 420SEL). Latest model year 1991: 13 to 15 MPG combined across 2 trims.

15best combined MPG (1991)
14 / 17city / highway of the best trim
13lowest combined MPG (1991)
6model years rated
$5,160a year to fuel, cheapest 1991 trim at EPA prices

Mercedes-Benz 420 fuel cost calculator

Enter what you pay for fuel and how far you drive in a year. The starting prices are the ones the EPA uses for its own yearly fuel-cost estimates. Every cost on this page updates as you type.

At $5.16 a gallon for premium and 15,000 miles a year, the cheapest 1991 Mercedes-Benz 420 to fuel is the 420SEL, 4.2 L, 8 cyl (15 MPG) at $5,160 a year. The 420 SE, 4.2 L, 8 cyl (13 MPG) costs $5,950, so the thriftier trim saves $790 a year and $3,950 over five years.

1991 trimEngineTransmissionDriveFuelCombCost/yrvs cheapest
420SEL4.2 L, 8 cylAuto 4-spdRWDPremium15$5,160cheapest
420 SE4.2 L, 8 cylAuto 4-spdRWDPremium13$5,950+$790

Cost per year is miles per year divided by the EPA combined rating, times your fuel price; electric vehicles use the EPA's kWh per 100 miles instead. Rounded to the nearest $10. Your prices are kept in this browser only.

Mercedes-Benz 420 MPG by year

YearBest combinedCityHwyBest trim that yearTrims
1991151417420SEL, 4.2 L, 8 cyl, Auto 4-spd2
1990151417420SEL, 4.2 L, 8 cyl, Auto 4-spd2
1989151417420SEL, 4.2 L, 8 cyl, Auto 4-spd1
1988151417420SEL, 4.2 L, 8 cyl, Auto 4-spd1
1987151417420SEL, 4.2 L, 8 cyl, Auto 4-spd1
1986151417420SEL, 4.2 L, 8 cyl, Auto 4-spd1

Every Mercedes-Benz 420 trim

YearTrimEngineTransmissionDriveFuelCityHwyCombCO2 g/miFuel cost/yr
1991420SEL4.2 L, 8 cylAuto 4-spdRWDPremium141715592$5,160
1991420 SE4.2 L, 8 cylAuto 4-spdRWDPremium111513684$5,950
1990420SEL4.2 L, 8 cylAuto 4-spdRWDPremium141715592$5,160
1990420SE4.2 L, 8 cylAuto 4-spdRWDPremium121513684$5,950
1989420SEL4.2 L, 8 cylAuto 4-spdRWDPremium141715592$5,160
1988420SEL4.2 L, 8 cylAuto 4-spdRWDPremium141715592$5,160
1987420SEL4.2 L, 8 cylAuto 4-spdRWDPremium141715592$5,160
1986420SEL4.2 L, 8 cylAuto 4-spdRWDPremium141715592$5,160

CO2 is tailpipe grams per mile from the EPA test. Fuel cost per year uses the prices and miles in the calculator above (the EPA's own prices and 15,000 miles a year until you change them); blank when the fuel has no price here (hydrogen, natural gas).

Compare with other 1991 Midsize Cars

VehicleCombinedCityHwy
1991 Dodge Spirit252131
1991 Plymouth Acclaim252131
1991 Chevrolet Corsica242128
1991 Mazda 626/MX-6242129
1991 Buick Century221928
1991 Oldsmobile Cutlass Ciera221928

All Midsize Cars ranked by MPG

Questions people ask

What is the best MPG for a Mercedes-Benz 420?

The most efficient Mercedes-Benz 420 the EPA has rated is the 1991 420SEL at 15 MPG combined (14 city, 17 highway).

What MPG does the 1991 Mercedes-Benz 420 get?

1991 Mercedes-Benz 420 trims range from 13 to 15 MPG combined, depending on engine, transmission and drivetrain.

Which Mercedes-Benz 420 has the worst fuel economy?

The 1991 420 SE is the lowest rated at 13 MPG combined.

How much does it cost to fuel a Mercedes-Benz 420 for a year?

At $5.16 a gallon for premium and 15,000 miles a year, the cheapest 1991 Mercedes-Benz 420 to fuel is the 420SEL, 4.2 L, 8 cyl (15 MPG) at $5,160 a year. The 420 SE, 4.2 L, 8 cyl (13 MPG) costs $5,950, so the thriftier trim saves $790 a year and $3,950 over five years.

More from Mercedes-Benz: every Mercedes-Benz model. Fuel types on this model: Premium. EPA classes: Midsize Cars.