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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 GLC Coupe doesn’t offer comfort guides on its rear 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 GLC Coupe doesn’t offer a back seat reminder.
When descending a steep, off-road slope, the Terrain’s standard Hill Descent Control allows you to creep down safely. The GLC Coupe doesn’t offer Hill Descent Control.
To help make backing safer, the Terrain (except SL)’s optional 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 GLC Coupe doesn’t offer a cross-path warning system.
Both the Terrain and the GLC Coupe have standard driver and passenger frontal airbags, front side-impact airbags, side-impact head airbags, front seatbelt pretensioners, 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 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 Terrain the rating of “Top Pick” for 2017, a rating granted to only 157 vehicles tested by the IIHS. The GLC Coupe has not been tested, yet.
GMC’s powertrain warranty covers the Terrain 1 year and 10,000 miles longer than Mercedes covers the GLC Coupe. Any repair needed on the engine, transmission, axles, joints or driveshafts is fully covered for 5 years or 60,000 miles. Coverage on the GLC Coupe ends after only 4 years or 50,000 miles.
The Terrain’s corrosion warranty is 1 year longer than the GLC Coupe’s (6 vs. 5 years).
There are almost 5 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.
The Terrain’s optional 2.0 turbo 4-cyl. produces 11 more horsepower (252 vs. 241) than the GLC 300 Coupe’s standard 2.0 turbo 4-cyl.
On the EPA test cycle the Terrain AWD with its standard engine gets better fuel mileage than the GLC 300 Coupe (25 city/28 hwy vs. 21 city/27 hwy).
To lower fuel costs and make buying fuel easier, the GMC Terrain uses regular unleaded gasoline (premium recommended with the 2.0 turbo 4-cyl. engine for maximum performance). The GLC Coupe requires premium, which can cost 20 to 55 cents more per gallon.
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 GLC Coupe doesn’t offer a cap-less fueling system.
The Terrain stops shorter than the GLC Coupe:
60 to 0 MPH
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 GLC Coupe doesn’t offer vehicle monitored tire inflation.
The Terrain SLE/SLT/Denali 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 GLC Coupe; 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.
For better maneuverability, the Terrain w/17” wheels’ turning circle is 1.3 feet tighter than the GLC 300 Coupe’s (37.4 feet vs. 38.7 feet).
The GMC Terrain may be more efficient, handle and accelerate better because it weighs about 350 to 600 pounds less than the Mercedes GLC Coupe.
The Terrain is 4 inches shorter than the GLC Coupe, making the Terrain easier to handle, maneuver and park in tight spaces.
The front grille of the Terrain uses electronically controlled shutters to close off airflow and reduce drag when less engine cooling is needed. This helps improve highway fuel economy. The GLC Coupe doesn’t offer active grille shutters.
The Terrain uses computer-generated active noise cancellation to help remove annoying noise and vibration from the passenger compartment, especially at low frequencies. The GLC Coupe doesn’t offer active noise cancellation.
The Terrain has 1.1 inches more front headroom, .1 inches more front legroom, .2 inches more rear headroom and 2.5 inches more rear legroom than the GLC Coupe.
The Terrain has a much larger cargo volume with its rear seat up than the GLC Coupe with its rear seat up (29.6 vs. 17.6 cubic feet). The Terrain has a much larger cargo volume with its rear seat folded than the GLC Coupe with its rear seat folded (63.3 vs. 49.4 cubic feet).
The Terrain (except SL) offers a remote vehicle starting system, so the vehicle can be started from inside the driver's house. This allows the driver to comfortably warm up the engine before going out to the vehicle. The climate system will also automatically heat or cool the interior. The GLC Coupe doesn’t offer a remote starting system.
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 GLC Coupe does not have an oil pressure gauge.
To improve rear visibility by keeping the rear window clear, the Terrain has a standard rear wiper. The GLC Coupe doesn’t offer a rear wiper.
The Terrain is available in both front-wheel drive and four-wheel drive configurations. The GLC Coupe doesn’t offer a two-wheel drive configuration.
Insurance will cost less for the Terrain owner. The Complete Car Cost Guide estimates that insurance for the Terrain will cost $1880 to $3995 less than the GLC Coupe over a five-year period.
IntelliChoice estimates that five-year ownership costs (depreciation, financing, insurance, fuel, fees, repairs and maintenance) for the GMC Terrain will be $20889 to $23445 less than for the Mercedes GLC Coupe.
The GMC Terrain outsold the Mercedes GLC by 64% during 2018.
© 1991-2018 Advanta-STAR Automotive Research. All rights reserved.
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