Compare the2022 GMC TerrainVS 2021 Mercedes GLA

For enhanced safety, the GMC Terrain’s rear 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 GLA doesn’t offer height-adjustable 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 Terrain are reminded to check the back seat if they opened the rear door before starting out. The GLA doesn’t offer a back seat reminder.

The Terrain’s standard lane departure warning system alerts a temporarily inattentive driver when the vehicle begins to leave its lane and gently nudges the vehicle back towards its lane. A lane departure warning system costs extra on the GLA.

Both the Terrain and the GLA have standard driver and passenger frontal airbags, front side-impact airbags, side-impact head airbags, front seatbelt pretensioners, front-wheel drive, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, crash mitigating brakes, daytime running lights, rearview cameras, available all-wheel drive, blind spot warning systems, around view monitors and rear cross-path warning.

For its top level performance in all IIHS frontal, side, rear impact and roof-crush tests, and its standard front crash prevention system, the Insurance Institute for Highway Safety grants the Terrain the rating of “Top Pick” for 2017, a rating granted to only 213 vehicles tested by the IIHS. The GLA has not been tested, yet.

GMC’s powertrain warranty covers the Terrain 1 year and 10,000 miles longer than Mercedes covers the GLA. Any repair needed on the engine, transmission, axles, joints or driveshafts is fully covered for 5 years or 60,000 miles. Coverage on the GLA ends after only 4 years or 50,000 miles.

The Terrain’s corrosion warranty is 1 year longer than the GLA’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 Terrain’s warranty.

A reliable vehicle saves its owner time, money and trouble. Nobody wants to be stranded or have to be without a vehicle while it’s being repaired. Consumer Reports rates the Terrain’s reliability 25 points higher than the GLA.

J.D. Power and Associates’ 2021 Initial Quality Study of new car owners surveyed provide the statistics that show that GMC vehicles are better in initial quality than Mercedes vehicles. J.D. Power ranks GMC 17th in initial quality. With 29 more problems per 100 vehicles, Mercedes is ranked 25th.

From surveys of all its subscribers, Consumer Reports’ January 2021 Auto Issue reports that GMC vehicles are more reliable than Mercedes vehicles. Consumer Reports ranks GMC 4 places higher in reliability than Mercedes.

To lower fuel costs and make buying fuel easier, the GMC Terrain uses regular unleaded gasoline. The GLA requires premium, which can cost 20 to 55 cents more per gallon.

The Terrain FWD’s standard fuel tank has 2.2 gallons more fuel capacity than the GLA (14.9 vs. 12.7 gallons), for longer range between fill-ups. The Terrain AWD’s standard fuel tank has 2.9 gallons more fuel capacity than the GLA (15.6 vs. 12.7 gallons).

The Terrain 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 GLA doesn’t offer a cap-less fueling system.

In its Green Vehicle Guide, the U.S. Environmental Protection Agency (EPA) rates the GMC Terrain higher (7 out of 10) than the Mercedes GLA (5). This means the Terrain produces up to 8 pounds less smog-producing pollutants than the GLA every 15,000 miles.

A nine-speed automatic is standard on the GMC Terrain, for better acceleration and lower engine speed on the highway. Only an eight-speed automatic is available for the GLA.

The Terrain 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 GLA doesn’t offer vehicle monitored tire inflation.

The Terrain has a standard space-saver spare tire so you can replace a flat tire and drive to have the flat repaired or replaced. A spare tire isn’t available on the GLA; it requires you to depend on its run-flat tires, which limits mileage and speed before they are repaired. If a run-flat is damaged beyond repair by a road hazard your vehicle will have to be towed. Some tire options on the GLA don’t have a run-flat feature, either.

The Terrain uses computer-generated active noise cancellation to help remove annoying noise and vibration from the passenger compartment, especially at low frequencies. The GLA doesn’t offer active noise cancellation.

The Terrain has .6 inches more front headroom, 1.3 inches more front shoulder room, .4 inches more rear headroom, 1.7 inches more rear legroom and .8 inches more rear shoulder room than the GLA.

The Terrain has a much larger cargo volume with its rear seat up than the GLA with its rear seat up (29.6 vs. 15.4 cubic feet). The Terrain has a much larger cargo volume with its rear seat folded than the GLA with its rear seat folded (63.3 vs. 50.5 cubic feet).

Pulling a handle automatically lowers the Terrain’s rear seats, to make changing between passengers and cargo easier. The GLA doesn’t offer automatic folding seats.

The Terrain has a 1500 lbs. towing capacity. The GLA has no towing capacity.

Standard Trailer Sway Control on the Terrain uses the StabiliTrak® sensors to detect trailer sway, then uses individual brakes to counteract any swaying and help keep the tow vehicle and trailer steady. The GLA doesn’t offer electronic trailer sway control.

The Terrain’s instruments include an oil pressure gauge and a temperature gauge - which could save your engine! Often ‘idiot lights’ don’t warn you until damage has been done. The GLA does not have an oil pressure gauge.

To improve rear visibility by keeping the rear window clear, the Terrain has a standard rear fixed intermittent wiper with a full on position. The rear wiper standard on the GLA only has an intermittent setting, so in a hard rain visibility isn’t as good.

Consumer Reports rated the Terrain’s headlight performance “Good,” a higher rating than the GLA’s headlights, which were rated “Poor.”

To shield the driver and front passenger’s vision over a larger portion of the windshield and side windows, the Terrain has standard extendable sun visors. The GLA doesn’t offer extendable visors.

Both the Terrain and the GLA offer optional heated front seats. The Terrain Denali also offers optional heated rear seats to keep those passengers extremely comfortable in the winter. Heated rear seats aren’t available in the GLA.

The GMC Terrain outsold the Mercedes GLA by over three to one during the 2021 model year.