Does the 2014 Mercedes-Benz CLS63 AMG 4matic need premium gas?
Every gas trim of this model takes premium.
| Trim (engine / transmission) | Fuel | MPG | Fuel/yr |
|---|---|---|---|
| 5.5L 8-cyl, Automatic 7-spd, 4WD | PREMIUM | 18 | $4,300 |
The EPA records the fuel each version was tested on. Whether premium is strictly required or just recommended is an owner's-manual detail the EPA dataset doesn't include — so we don't guess it.
1 trim(s) · EPA FuelEconomy.gov · retrieved 2026-06-14.