38/100

2012Large CarsPremium

2012 Mercedes-Benz S400 Hybrid

EPA ID: 31799

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City MPG

Combined MPG

21MPG· Average

Highway MPG

Fuel Economy Overview

The 2012 Mercedes-Benz S400 Hybrid achieves an EPA-estimated 21 MPG in combined city and highway driving, with 19 MPG in the city and 25 MPG on the highway. Powered by a 3.5L 6-cylinder engine paired with a automatic 7-spd, this large cars features Rear-Wheel Drive drive.

In terms of environmental impact, the 2012 S400 Hybrid produces approximately 423 grams of CO2 per mile. This figure is measured under standardized EPA test conditions and represents tailpipe emissions only. For context, the average new vehicle sold in the United States produces approximately 400 grams of CO2 per mile, meaning this S400 Hybrid has higher-than-average emissions in this regard.

The estimated annual fuel cost for this vehicle is $3,300, based on 15,000 miles of driving per year and current national average fuel prices. Compared to the average new vehicle, you would save $5,750 over a 5-year period. This calculation accounts for differences in fuel consumption efficiency and provides a practical measure of long-term ownership costs attributable to fuel economy.

Energy DNA

Vehicle ClassLarge Cars

Fuel TypePremium

Engine3.5L 6-cyl

AspirationNaturally Aspirated

TransmissionAutomatic 7-spd

Drive TypeRear-Wheel Drive

Green Scorecard

CO2 Emissions423 g/mi

Start-Stop SystemEquipped

GHG Score-1/10

Smog RatingN/A

Est. Annual Cost$3,300

5-Year Cost DeltaSave $5,750

Personalized Commute CalculatorEPA defaults to 55% City / 45% Hwy

55% City45% Highway

Adjust the slider to match your daily driving habits. City driving involves stop-and-go traffic under 45mph, while highway driving represents sustained speeds over 55mph.

Your Real MPG

21.3

Impact vs EPA

$-35

/ year

💨

Aerodynamic Speed Penalty

EPA highway tests average roughly 48 mph. Driving at 75 mph increases aerodynamic drag exponentially. Expect your real-world highway fuel economy to drop by roughly 15-20% at interstate speeds.

5-Year Total Cost of Ownership

Estimated Monthly Cost

$895/mo

Includes estimated depreciation, fuel, insurance, and state fees over 5 years. Does not include loan interest.

Annual Mileage15,000 mi

Value Depreciation

Est. value lost over 60 months

$28,000

52.1%

Fuel & Electricity

Based on National Average rates ($3.50/gal)

$12,500

23.3%

Estimated Insurance

Based on vehicle class risk profile

$12,800

23.8%

State Registration Fees

Based on National Average DMV base rates

$400

0.7%

Total 5-Year Cost$53,700

Recall Intelligence

Campaign #11V493000·2014-09-12

critical

Component: TIRES:PRESSURE MONITORING AND REGULATING SYSTEMS

Mercedes-Benz USA, LLC (Mercedes Benz) is recalling certain model year 2011-2012 S550, S550 CGI, S63, S600 Bi-Turbo, S65 AMG, S550 4-Matic, and S550 CGI 4-Matic and S400 Hybrid vehicles manufactured from March 3, 2011, through July 30, 2011, for failing to comply with the requirements of Federal Motor Vehicles Safety Standard (FMVSS) number 138, "Tire Pressure Monitoring System (TPMS)." The tire pressure monitoring system indicators may only illuminate for a portion of the time required by the standard and under certain conditions may not re-illuminate immediately after the vehicle is restarted as required.

Consequence & Remedy

Consequence: If all four wheel sensors in the subject vehicles are simultaneously malfunctioning or missing, the TPMS will provide an initial warning, but this warning will not automatically repeat on subsequent ignition cycles, failing to remind the driver that the system is offline. Driving unknowingly with incorrectly inflated tires may result in sudden tire failure, increasing the risk of a crash.

Remedy: Mercedes Benz will notify owners, and dealers will reprogram the tire pressure monitoring unit, free of charge. The recall began on September 12, 2014. Owners may contact Mercedes Benz at 1-800-367-6372.

Campaign #12V557000·2013-02-15

critical

Component: FUEL SYSTEM, GASOLINE

Mercedes-Benz is recalling certain model year 2011-2012 S400, S550, S550 4Matic, S63 AMG, C300, C300 4Matic, E350, GLK350, GLK350 4Matic, CL550 4Matic, and CL63 AMG vehicles manufactured from April 18, 2011, through July 12, 2011. Due to an irregularity stemming from the molding process of the fuel filter flange, the fuel filter flange may crack when operated in high temperatures.

Consequence & Remedy

(Based on 200,000 miles driven)

84.6 metric tons CO₂

Equivalent To:

🌳 105 tree seedlings grown for 10 yrs

✈️ 7.1 cross-country flights/yr

Data Provenance

Data directly from the EPA National Vehicle and Fuel Emissions Laboratory. The combined rating is a weighted average (55% city, 45% highway). For official figures, visit fueleconomy.gov.