Buick Enclave vs Mercedes-Benz GLE-Class: Specs Compared

Running cost over five years: at the EPA's 15,000-mile-a-year assumption the Buick Enclave burns about $2,650 of fuel annually against $3,150 for the Mercedes-Benz GLE-Class. That $500 yearly gap compounds to roughly $2,500 over five years and $4,000 over eight — often more than the price difference between two trims of the same vehicle, and the single largest running-cost line item separating these two.

City and highway economy: the Mercedes-Benz GLE-Class leads in both cycles — 23 mpg city and 29 mpg highway against 20 and 27 mpg — so its fuel-efficiency advantage holds whether you commute in traffic or cover long highway miles.

Powertrain choice: the Buick Enclave is recorded with 1 distinct engine configuration (SIDI), the Mercedes-Benz GLE-Class with 4 (SIDI; Mild Hybrid, SIDI; PHEV, SIDI). Across 26 recorded Buick Enclave configurations and 92 for the Mercedes-Benz GLE-Class, the wider the engine spread the more the real-world fuel efficiency depends on which version you actually buy, so check the specific model year and drivetrain rather than the headline number.

Drivetrain and class: the Buick Enclave is offered with All-Wheel Drive, Front-Wheel Drive, the Mercedes-Benz GLE-Class with All-Wheel Drive, Rear-Wheel Drive, 4-Wheel Drive. All-wheel drive typically costs one to two mpg combined against the same vehicle in front- or rear-wheel drive, which is worth remembering when the gap between these two is small. The EPA classes them as Standard Sport Utility Vehicle 4WD and Standard Sport Utility Vehicle 4WD respectively — the class drives the interior volume, cargo space and passenger space each one is measured against.

Tailpipe emissions: at their cleanest configurations the Mercedes-Benz GLE-Class emits 99 g/mile of CO2 versus 387 g/mile for the Buick Enclave. Emissions track fuel consumption almost exactly, so the cleaner vehicle here is also the cheaper one to fuel.