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2012 Mercedes-Benz M-Class Gas Tank Size & Fuel Capacity

SUV 4 trims listed 1 fuel-system recall ← 2011 2013 →

Fuel tank capacity

24.6gal · 93 L

The 2012 Mercedes-Benz M-Class has a fuel tank capacity of 24.6 gallons (93 liters) on every trim.

A full tank is good for roughly 492–664 highway miles or 369–492 miles around town, going by the EPA ratings.

24.6 gal · Bigger than 82% of 2012 models we list.

Highway range
492–664 mi
City range
369–492 mi
Fuel
Premium unleaded (required)
Tank sizes
1
Trims
4

2012 Mercedes-Benz M-Class fuel tank capacity by trim

What changes the tank sizeTap an option to filter the table

Powertrain
no difference
Engine
no difference

All 4 trims

MPG and range are city / highway.

TrimEngineDrive Tank Fuel MPG city / hwy Range city / hwy
ML350 4MATIC 4dr SUV AWD 3.5L 6cyl 7A · AWD · Premium (required) MPG 17 / 22Range 418 / 541 mi 3.5L 6cyl 7A AWD 24.6 gal93 L Premiumrequired 17 / 22 418 / 541 mi
ML350 BlueTEC 4dr SUV AWD 3.0L 6cyl Turbodiesel 7A · AWD · Diesel Diesel MPG 20 / 27Range 492 / 664 mi 3.0L 6cyl Turbodiesel 7A Diesel AWD 24.6 gal93 L Diesel 20 / 27 492 / 664 mi
ML550 4MATIC 4dr SUV AWD 4.7L 8cyl Turbo 7A · AWD · Premium (required) MPG 15 / 20Range 369 / 492 mi 4.7L 8cyl Turbo 7A AWD 24.6 gal93 L Premiumrequired 15 / 20 369 / 492 mi
ML63 AMG 4dr SUV AWD 5.5L 8cyl Turbo 7A · AWD · Premium (required) MPG 15 / 25Range 369 / 615 mi 5.5L 8cyl Turbo 7A AWD 24.6 gal93 L Premiumrequired 15 / 25 369 / 615 mi

Tank figures are the manufacturer's rated capacity, sorted smallest tank first. Range is tank size times EPA city or highway MPG.

How far a 2012 Mercedes-Benz M-Class goes on a tank

Gallons left and the distance they cover at each mark on the fuel gauge, at EPA city and highway mileage. At the combined rating of 22 MPG, a full 24.6-gallon tank covers about 541 miles.

GaugeGallonsHighway milesCity miles
Full24.6664492
3/418.5498369
1/212.3332246
1/46.2166123
1/83.18362

Over 15,000 miles a year (the EPA's yearly estimate) this configuration uses about 682 gallons, roughly 28 full tanks.

Fuel gauges aren't perfectly linear and the low-fuel light comes on with a few gallons still in the tank, so plan your stop before the last eighth.

What it costs to fill up a 2012 Mercedes-Benz M-Class

$129.89 to fill the 24.6-gallon tank from empty with premium, at this week's US average of $5.28 a gallon.

TankFuelUS avg / galFrom emptyFrom 1/4 tank
24.6 galPremium$5.28$129.89$97.42
24.6 galDiesel$6.35$156.21$117.16

By region, 24.6-gallon tank

RegionPremium / galFill from empty
East Coast$4.93$121.28
Midwest$5.37$132.10
Gulf CoastLowest$4.57$112.42
Rocky Mountain$5.12$125.95
West Coast$6.08$149.57
CaliforniaHighest$6.36$156.46

Prices: U.S. Energy Information Administration retail averages for the week of October 26, 2026. This week's prices by state and city.

Your own price

  • 24.6-gallon tank$129.89
  • A year of driving (15,000 mi)$3,600

Starts at the US average for premium; type in what your station charges. For other tank sizes, use the fill-up calculator.

M-Class tank size in other years

The tank changed for 2012: 24.6 gal, against 23.8–25.1 gal on the 2011 M-Class.

Model yearTankLongest highway range
2015 M-Class 24.6 gal 713 mi
2014 M-Class 24.6 gal 689 mi
2013 M-Class 24.6 gal 689 mi
2012 M-Class 24.6 gal 664 mi
2011 M-Class 23.8–25.1 gal 628 mi
2010 M-Class 23.8–25.1 gal 628 mi
2009 M-Class 25.1 gal 602 mi
2008 M-Class 25.1 gal 602 mi
2007 M-Class 25.1 gal 602 mi
Mercedes-Benz M-Class fuel tank by model yearSmallest tank Larger tank options
19981999200020012002200320042006200720082009201020112012201320142015
← 2011 Mercedes-Benz M-Class Every M-Class year 2013 Mercedes-Benz M-Class →

2012 Mercedes-Benz M-Class vs similar 2012 SUVs

At 24.6 gallons, the M-Class's largest tank ranks second of the seven 2012 SUVs compared here. The Porsche Cayenne carries the most (26.4 gal) and the Acura MDX the least (21.0 gal).

2012 modelTankLongest highway range
Porsche Cayenne 22.4–26.4 gal 581 mi
Mercedes-Benz M-Class 24.6 gal 664 mi
Lexus GX 460 23.0 gal 460 mi
Land Rover LR4 22.8 gal 388 mi
BMW X5 22.5 gal 585 mi
Volvo XC90 21.1 gal 485 mi
Acura MDX 21.0 gal 441 mi

Other 2012 SUVs of a similar size, one model per brand.

2012 Mercedes-Benz M-Class fuel system recalls

NHTSA lists 1 fuel-system recall for the 2012 Mercedes-Benz M-Class, out of 3 recalls in total. A recall applies only to the vehicles named in it, so check your VIN.

Delivery · Fuel pump · Control/drive moduleDec 23, 2022 · NHTSA 22V955000 · Mercedes-Benz USA, LLC · 348,183 vehicles

Mercedes-Benz USA, LLC. (MBUSA) is recalling certain 2012-2014 ML550, 2012-2015 ML350, AMG ML63, 2015 ML250, ML400, 2016 GLE450, GLE300, 2016-2018 GLE350, GLE550, 2016-2019 GLE400, 2017-2019 AMG GLE43, and 2016-2020 AMG GLE63 vehicles. Water might accumulate in the spare tire wheel well and damage the fuel pump control unit, which could cause an engine stall while driving.

Risk and remedy

Risk: An engine stall while driving increases the risk of a crash.

Remedy: Dealers will install a water drain plug, inspect for water intrusion, and replace the fuel pump control unit as necessary, free of charge. Owner notification letters were mailed February 15, 2023. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's numbers for this recall are 2023010002 and 2023010003.

All Mercedes-Benz fuel recalls Look up your tank by VIN

Frequently asked questions

What is the fuel tank capacity of the 2012 Mercedes-Benz M-Class?

The 2012 Mercedes-Benz M-Class holds 24.6 gallons (93 liters) on every trim we list.

How many gallons and liters does the 2012 Mercedes-Benz M-Class gas tank hold?

The 2012 Mercedes-Benz M-Class tank holds 93 liters, or 24.6 gallons in US gallons.

Does the 2012 Mercedes-Benz M-Class tank change with the powertrain?

No. Gas and Diesel versions of the 2012 Mercedes-Benz M-Class use the same 24.6 gal tank.

How far can a 2012 Mercedes-Benz M-Class go on a full tank?

About 492–664 miles on the highway and 369–492 miles in town, going from full to empty at its EPA ratings. Expect less in practice, since nobody runs the tank dry.

How many miles can a 2012 Mercedes-Benz M-Class go on a quarter tank?

About 166 highway miles or 123 in town from the 24.6-gallon tank, which has roughly 6.2 gallons left at the quarter mark. Gauges aren't exact, so treat that as a guide.

What gas does the 2012 Mercedes-Benz M-Class take?

Premium unleaded (required), or Diesel fuel, depending on the engine. The label inside the fuel door confirms it for your car.

How much does it cost to fill up a 2012 Mercedes-Benz M-Class?

At the US average of $5.28 a gallon for premium (EIA, week of October 26, 2026), filling the 24.6-gallon tank from empty costs $129.89. It ranges from $112.42 in the Gulf Coast to $156.46 in California.

How much does a full tank of gas weigh in a 2012 Mercedes-Benz M-Class?

About 172 pounds for the 24.6-gallon tank. Diesel weighs roughly 7 pounds a gallon.

Does the 2012 Mercedes-Benz M-Class have a bigger gas tank than the BMW X5?

Yes. The 2012 Mercedes-Benz M-Class holds up to 24.6 gallons; the 2012 BMW X5 holds up to 22.5.

Has the 2012 Mercedes-Benz M-Class had a fuel pump or fuel system recall?

Yes. NHTSA lists 1 fuel-system recall for the 2012 Mercedes-Benz M-Class: 22V955000 (delivery · fuel pump · control/drive module). Check your VIN at nhtsa.gov/recalls to see if your car is affected.

Sources

  • Tank sizes: manufacturer-rated capacities from US-market specifications, checked against independent references. Updated October 2026.
  • MPG and range: EPA ratings. Range is tank size times EPA MPG.
  • Fuel prices: U.S. Energy Information Administration, week of October 26, 2026 (this week's prices).
  • Recalls: NHTSA recall database (Mercedes-Benz fuel system recalls).

Does your owner's manual say something different? Let us know and we'll fix it. More on how we check the numbers.

Other 2012 Mercedes-Benz models

C-Class17.4 gallons CL-Class21.9–23.8 gallons CLS-Class21.1 gallons E-Class17.4–21.1 gallons G-Class25.4 gallons GL-Class26.4 gallons GLK-Class17.4 gallons R-Class21.1 gallons S-Class21.1–23.8 gallons SL-Class21.1 gallons SLK-Class18.5 gallons SLS AMG®22.5 gallons