2014 Mercedes-Benz S-Class — Full Specifications
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The 2014 Mercedes-Benz S-Class is a saloon/sedan offered with 2 engines (4.7L 8-cyl turbo, 5.5L 8-cyl turbo). Its most fuel-efficient configuration returns around 24 mpg (UK) / 20 mpg (US EPA) combined, with 22–24 mpg (UK) across all configurations. Owners often keep a Mercedes-Benz S-Class workshop manual to hand for servicing and repairs.
Compared with the 2013 Mercedes-Benz S-Class: Fuel economy is essentially unchanged at around 24 mpg (UK) combined. No longer listed: 3.5L 6-cyl, 5.5L 12-cyl turbo, 6L 12-cyl turbo. EPA passenger volume changes from 109 to 112 cu ft.
Full Specifications
| Engine (most efficient) | 4.7L 8-cyl turbo |
|---|---|
| Engine options | 4.7L 8-cyl turbo · 5.5L 8-cyl turbo |
| Transmission (most efficient) | Automatic 7-spd |
| Fuel Type | Premium Gasoline |
| Powertrain | Conventional |
| Drive | Rear-Wheel Drive |
| Body Style | Saloon/Sedan |
| Passenger Volume (EPA) | 112 cu ft (3,171 L) |
| Luggage Volume (EPA) | 12 cu ft (340 L) |
| Fuel Economy (UK) | 24 combined / 20 urban / 31 extra-urban mpg |
| Fuel Economy (US EPA) | 20 combined / 17 city / 26 highway mpg |
| CO₂ Emissions | 276 g/km |
| EPA Greenhouse Gas Score | 4 / 10 (10 = lowest emissions) |
| EPA Est. Annual Fuel Cost | $4,100 (15,000 mi/yr, US prices) |
Engine & Transmission Options
EPA lists 3 configurations for the 2014 Mercedes-Benz S-Class across 2 engines (4.7L 8-cyl turbo, 5.5L 8-cyl turbo). Combined fuel economy ranges from 18 to 20 mpg (US), or 22 to 24 mpg (UK), depending on engine, transmission and drive. The headline figures at the top of this page describe the most fuel-efficient configuration.
| Engine | Transmission | Drive | MPG (UK) | MPG (US) | CO₂ g/km | Fuel cost / yr |
|---|---|---|---|---|---|---|
| 4.7L 8-cyl turbo | Automatic 7-spd | 4-Wheel Drive | 23 | 19 (16/26) | 287 | $4,350 |
| 4.7L 8-cyl turbo | Automatic 7-spd | Rear-Wheel Drive | 24 | 20 (17/26) | 276 | $4,100 |
| 5.5L 8-cyl turbo | Automatic 7-spd | 4-Wheel Drive | 22 | 18 (15/23) | 310 | $4,550 |
MPG (US) shows combined, with city/highway in brackets. Highlighted row = the configuration used for the headline figures. Source: US EPA fueleconomy.gov.
EPA measures interior passenger volume at 112 cubic feet (about 3,171 litres) and luggage volume at 12 cubic feet (about 340 litres). These are US EPA interior-volume figures; they are measured differently from the boot capacity numbers UK manufacturers quote.
Owner Essentials for the 2014 Mercedes-Benz S-Class
Running Costs: 2014 Mercedes-Benz S-Class
Covering around 8,000 miles a year in a 2014 Mercedes-Benz S-Class at 24 mpg combined, expect roughly 1,515 litres of fuel annually — multiply by your local price per litre for a cost estimate. For US owners, the EPA estimates about $4,100 a year in fuel for the most efficient configuration (15,000 miles, national average prices). Work out exact fuel costs with the fuel cost calculator on 247Calculators.
Convert between MPG and L/100km with the unit converters on 247QuickTools. Not sure what tyre size fits? 247TyreCheck explains tyre sizing.
Only need this car occasionally? See our buy vs rent comparison.
2014 Mercedes-Benz S-Class Safety Ratings (NHTSA)
No NHTSA crash-test rating is on record for this model year. The NHTSA rates only a subset of vehicles each year; you can browse every rated vehicle on our NHTSA Safety Ratings hub.
Recalls & Owner Complaints (NHTSA)
NHTSA lists no safety recall campaigns for the 2014 Mercedes-Benz S-Class as of 6 October 2026. Recalls can be issued years after a model is sold, so it is still worth checking your own VIN.
Owners have filed 25 complaints with NHTSA about the 2014 Mercedes-Benz S-Class. The most-reported areas are Unspecified (5), Steering (3), Seat belts (2). Complaints include 4 reported crashes, 2 reported injuries. That is close to the median of 22 complaints across the 15 Mercedes-Benz S-Class model years in our data.
Used-buyer checklist for the 2014 Mercedes-Benz S-Class
Based on where NHTSA recalls and owner complaints cluster for this model year, these are the areas worth checking before you buy:
- Steering (3 owner complaints) — Check for play, noise or heavy steering, and ask whether any steering recall work was done.
- Seat belts (2 owner complaints) — Check every belt latches and retracts properly and that any restraint recalls were completed.
- Suspension (2 owner complaints) — Listen for knocks over bumps and check tyre wear for signs of alignment problems.
Source: US NHTSA recall and consumer-complaint databases, retrieved 6 October 2026. Complaints are unverified owner reports, not confirmed defects. Check any vehicle by VIN at nhtsa.gov/recalls, and see our guide to checking a used car for recalls.
How It Compares
Mercedes-Benz models in our database average about 26 mpg (UK) combined on their most efficient configuration; the 2014 Mercedes-Benz S-Class's 24 mpg is 2 mpg below that make average.
Of the 17 Mercedes-Benz S-Class model years we cover, the 2014 ranks 4th for combined fuel economy on its best configuration (24 mpg UK combined, against a high of 26 mpg). See every Mercedes-Benz S-Class year side by side.
Last updated: · Data: US EPA (fueleconomy.gov) and NHTSA safety ratings 18 July 2026; NHTSA recalls and complaints 6 October 2026; Wikidata & curated EU catalogue 18 July 2026; European generation and engine data from Wikipedia 7 October 2026
Vehicle data sourced from manufacturer specifications. Always verify with your vehicle handbook or a qualified mechanic. This is a reference tool, not professional advice.
Recommended Accessories for the 2014 Mercedes-Benz S-Class
Frequently Asked Questions
What engine does the 2014 Mercedes-Benz S-Class have?
EPA lists 2 engines for the 2014 Mercedes-Benz S-Class: 4.7L 8-cyl turbo, 5.5L 8-cyl turbo. The most fuel-efficient configuration pairs the 4.7L 8-cyl turbo with a automatic 7-spd.
What is the fuel economy of the 2014 Mercedes-Benz S-Class?
The most efficient configuration returns around 24 mpg (UK) combined, or 20 mpg on the US EPA cycle. Across all configurations the UK combined figure runs from 22 to 24 mpg.
How much does the 2014 Mercedes-Benz S-Class cost to fuel per year?
The US EPA estimates about $4,100 a year in fuel for the most efficient configuration, based on 15,000 miles of mixed driving and national average fuel prices. Your own cost will depend on mileage and local prices.
Does the 2014 Mercedes-Benz S-Class have any recalls?
NHTSA lists no safety recall campaigns for the 2014 Mercedes-Benz S-Class as of 6 October 2026. Recalls can be issued years after a model is sold, so it is still worth checking your own VIN.
What are the most common problems reported for the 2014 Mercedes-Benz S-Class?
Among the 25 owner complaints filed with NHTSA, the most-reported areas are Unspecified (5 complaints), Steering (3 complaints), Seat belts (2 complaints). Complaints are unverified owner reports, not confirmed defects, and raw counts rise with how many cars were sold.
How much interior and luggage space does the 2014 Mercedes-Benz S-Class have?
EPA measures interior passenger volume at 112 cubic feet (about 3,171 litres) and luggage volume at 12 cubic feet (about 340 litres). These are US EPA interior-volume figures, which are measured differently from the UK boot-capacity numbers manufacturers quote.