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The Acadia Denali’s optional pre-crash front seatbelts will tighten automatically in the event the vehicle detects an impending crash, improving protection against injury significantly. The GLB doesn’t offer pre-crash pretensioners.
For enhanced safety, the front shoulder belts of the GMC Acadia are height-adjustable, and the middle seat shoulder belts have child comfort guides to move the belt to properly fit children. A better fit can prevent injuries and the increased comfort also encourages children to buckle up. The Mercedes GLB doesn’t offer comfort guides on its middle seat belts.
In the past twenty years hundreds of infants and young children have died after being left in vehicles, usually by accident. When turning the vehicle off, drivers of the Acadia are reminded to check the back seat if they opened the rear door before starting out. The GLB doesn’t offer a back seat reminder.
The Acadia has a standard front seat center airbag, which deploys between the driver and front passenger, protecting them from injuries caused by striking each other in serious side impacts. The GLB doesn’t offer front seat center airbags.
To help make backing safer, the Acadia’s cross-path warning system uses wide-angle radar in the rear bumper to alert the driver to vehicles approaching from the side, helping the driver avoid collisions. The GLB doesn’t offer a cross-path warning system.
Both the Acadia and the GLB have standard driver and passenger frontal airbags, front side-impact airbags, driver knee airbags, side-impact head airbags, front seatbelt pretensioners, front wheel drive, height adjustable front shoulder belts, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, daytime running lights, rearview cameras, available all wheel drive, crash mitigating brakes, lane departure warning systems and around view monitors.
For its top level performance in all IIHS frontal, side, rear impact and roof-crush tests, and with its optional front crash prevention system, the Insurance Institute for Highway Safety grants the Acadia the rating of “Top Pick” for 2017, a rating granted to only 202 vehicles tested by the IIHS. The GLB has not been tested, yet.
GMC’s powertrain warranty covers the Acadia 1 year and 10,000 miles longer than Mercedes covers the GLB. Any repair needed on the engine, transmission, axles, joints or driveshafts is fully covered for 5 years or 60,000 miles. Coverage on the GLB ends after only 4 years or 50,000 miles.
The Acadia’s corrosion warranty is 1 year longer than the GLB’s (6 vs. 5 years).
There are over 4 times as many GMC dealers as there are Mercedes dealers, which makes it much easier should you ever need service under the Acadia’s warranty.
The Acadia’s optional 2.0 turbo 4-cylinder produces 9 more horsepower (230 vs. 221) than the GLB’s 2.0 turbo 4-cylinder. The Acadia’s optional 3.6 DOHC V6 produces 89 more horsepower (310 vs. 221) and 13 lbs.-ft. more torque (271 vs. 258) than the GLB’s 2.0 turbo 4-cylinder.
Regenerative brakes improve the Acadia 2.0 Turbo’s fuel efficiency by converting inertia back into energy instead of wasting it. The GLB doesn’t offer a regenerative braking system.
To lower fuel costs and make buying fuel easier, the GMC Acadia uses regular unleaded gasoline (premium recommended with the 2.0 turbo 4-cylinder engine for maximum performance). The GLB requires premium, which can cost 20 to 55 cents more per gallon.
The Acadia FWD’s standard fuel tank has 3.5 gallons more fuel capacity than the GLB (19.4 vs. 15.9 gallons), for longer range between fill-ups. The Acadia AWD’s standard fuel tank has 5.8 gallons more fuel capacity than the GLB (21.7 vs. 15.9 gallons).
The Acadia has a standard cap-less fueling system. The fuel filler is automatically opened when the fuel nozzle is inserted and automatically closed when it’s removed. This eliminates the need to unscrew and replace the cap and it reduces fuel evaporation, which causes pollution. The GLB doesn’t offer a cap-less fueling system.
A nine-speed automatic is standard on the GMC Acadia, for better acceleration and lower engine speed on the highway. Only an eight-speed automatic is available for the GLB.
The Acadia’s standard front and rear disc brakes are vented to help dissipate heat for shorter stops with less fading. The rear discs on the GLB are solid, not vented.
For better traction, the Acadia AT4’s tires are larger than the largest tires available on the GLB (255/65R17 vs. 235/55R18).
The GMC Acadia’s wheels have 6 lugs for longer wheel bearing life, less chance of rotor warping and greater strength. The Mercedes GLB only has 5 wheel lugs per wheel.
The Acadia has a standard easy tire fill system. When inflating the tires, the vehicle’s integrated tire pressure sensors keep track of the pressure as the tires fill and tell the driver when the tires are inflated to the proper pressure. The GLB doesn’t offer vehicle monitored tire inflation.
For a smoother ride and more stable handling, the Acadia’s wheelbase is 1.1 inches longer than on the GLB (112.5 inches vs. 111.4 inches).
For better handling and stability, the track (width between the wheels) on the Acadia is 1.3 inches wider in the front and 1.3 inches wider in the rear than on the GLB.
The front grille of the Acadia FWD 4 cyl. uses electronically controlled shutters to close off airflow and reduce drag when less engine cooling is needed. This helps improve highway fuel economy. The GLB doesn’t offer active grille shutters.
The Acadia uses computer-generated active noise cancellation to help remove annoying noise and vibration from the passenger compartment, especially at low frequencies. The GLB doesn’t offer active noise cancellation.
The Acadia has a much larger cargo volume with its rear seat up than the GLB with its rear seat up (12.8 vs. 5.1 cubic feet). The Acadia has a much larger cargo volume with its rear seat folded than the GLB with its rear seat folded (79 vs. 62 cubic feet).
To improve rear visibility by keeping the rear window clear, the Acadia has a standard rear fixed intermittent wiper with a full on position. The rear wiper standard on the GLB only has an intermittent setting, so in a hard rain visibility isn’t as good.
Both the Acadia and the GLB offer available heated front seats. The Acadia also offers optional heated second row seats to keep those passengers extremely comfortable in the winter. Heated second row seats aren’t available in the GLB.
The Acadia (except SL) offers an optional 115-volt a/c outlet on the center console, allowing you to recharge a laptop or run small household appliances without special adapters that can break or get misplaced. The GLB doesn’t offer a house-current electrical outlet.
The GMC Acadia outsold the Mercedes GLB by almost 85 to one during 2019.
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