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For enhanced safety, the front and middle seat shoulder belts of the Mercedes GLB have pretensioners to tighten the seatbelts and eliminate dangerous slack in the event of a collision. The Mazda CX-5 doesn’t offer pretensioners for the middle seat belts.
When descending a steep, off-road slope, the GLB’s standard Downhill Speed Regulation allows you to creep down safely. The CX-5 doesn’t offer Downhill Speed Regulation.
The GLB’s driver alert monitor detects an inattentive driver then sounds a warning and suggests a break. According to the NHTSA, drivers who fall asleep cause about 100,000 crashes and 1500 deaths a year. The CX-5 doesn’t offer a driver alert monitor.
Both the GLB and the CX-5 have standard driver and passenger frontal airbags, front side-impact airbags, side-impact head airbags, front-wheel drive, height adjustable front shoulder belts, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, crash mitigating brakes, daytime running lights, rearview cameras, available all-wheel drive, lane departure warning systems, blind spot warning systems and around view monitors.
The GLB comes with a full 4-year/50,000-mile basic warranty, which covers the entire truck and includes 24-hour roadside assistance. The CX-5’s 3-year/36,000-mile basic warranty expires 1 year and 14,000 miles sooner.
J.D. Power and Associates’ 2019 survey of the owners of three-year-old vehicles provides the long-term dependability statistics that show that Mercedes vehicles are more reliable than Mazda vehicles. J.D. Power ranks Mercedes 13th in reliability, above the industry average. With 25 more problems per 100 vehicles, Mazda is ranked 21st.
The GLB’s 2.0 turbo 4-cylinder produces 34 more horsepower (221 vs. 187) and 72 lbs.-ft. more torque (258 vs. 186) than the CX-5’s standard 2.5 DOHC 4-cylinder.
On the EPA test cycle the GLB 250 4MATIC Auto gets better fuel mileage than the CX-5 GT Reserve/Signature AWD (23 city/31 hwy vs. 22 city/27 hwy).
In heavy traffic or at stoplights the GLB’s engine automatically turns off when the vehicle is stopped, saving fuel and reducing pollution. The engine is automatically restarted when the driver gets ready to move again. (Start/Stop isn’t accounted in present EPA fuel mileage tests.) The CX-5 doesn’t offer an automatic engine start/stop system.
The GLB has 1.1 gallons more fuel capacity than the CX-5 FWD’s standard fuel tank (15.9 vs. 14.8 gallons), for longer range between fill-ups.
An eight-speed automatic (SMG) is standard on the Mercedes GLB, for better acceleration and lower engine speed on the highway. Only a six-speed automatic is available for the CX-5.
The GLB offers a standard sequential manual gearbox (SMG). With no clutch pedal to worry about and a fully automatic mode, an SMG is much more efficient than a conventional automatic but just as easy to drive. The CX-5 doesn’t offer an SMG or a conventional manual transmission.
For better stopping power the GLB’s brake rotors are larger than those on the CX-5:
CX-5 GT Reserve/Signature
For better traction, the GLB has larger tires than the CX-5 (235/55R18 vs. 225/65R17).
The GLB’s standard tires provide better handling because they have a lower 55 series profile (height to width ratio) that provides a stiffer sidewall than the CX-5 Sport/Touring’s standard 65 series tires. The GLB’s optional tires have a lower 50 series profile than the CX-5 Grand Touring/Signature’s 55 series tires.
For better ride, handling and brake cooling the GLB has standard 18-inch wheels. Smaller 17-inch wheels are standard on the CX-5 Sport/Touring. The GLB’s optional 20-inch wheels are larger than the 19-inch wheels on the CX-5 Grand Touring/Signature.
Changing a flat tire near traffic can be dangerous and inconvenient. The run-flat tires available on the GLB can be driven up to 50 miles without any air pressure, allowing you to drive to a service station for a repair. The CX-5 doesn’t offer run-flat tires.
The GLB offers an optional driver-adjustable suspension system. It allows the driver to choose between an extra-supple ride, reducing fatigue on long trips, or a sport setting, which allows maximum control for tricky roads or off-road. The CX-5’s suspension doesn’t offer adjustable shock absorbers.
The GLB’s drift compensation steering can automatically compensate for road conditions which would cause the vehicle to drift from side to side, helping the driver to keep the vehicle straight more easily. The CX-5 doesn’t offer drift compensation steering.
For a smoother ride and more stable handling, the GLB’s wheelbase is 5.2 inches longer than on the CX-5 (111.4 inches vs. 106.2 inches).
For greater off-road capability the GLB has a greater minimum ground clearance than the CX-5 (7.9 vs. 7.5 inches), allowing the GLB to travel over rougher terrain without being stopped or damaged.
The GLB offers optional seating for 7 passengers; the CX-5 can only carry 5.
The GLB has 1 inch more front headroom, .1 inches more front legroom, .3 inches more rear headroom and .1 inches more rear shoulder room than the CX-5.
The GLB’s cargo area provides more volume than the CX-5.
Second Seat Folded
62 cubic feet
59.6 cubic feet
A standard locking glovebox keeps your small valuables safer in the GLB. The CX-5 doesn’t offer locking storage for small valuables.
To make loading groceries and cargo easier when your hands are full, the GLB’s available liftgate can be opened and closed just by kicking your foot under the back bumper, leaving your hands completely free. The CX-5 doesn’t offer a hands-free gesture to open its liftgate, forcing you to put cargo down if your hands are full.
J.D. Power and Associates surveys of service recipients show that Mercedes service is better than Mazda. J.D. Power ranks Mercedes fifth in service department satisfaction. With a 59% lower rating, Mazda is ranked 25th.
Unlike the driver-only memory seat in the CX-5 Grand Touring/Signature, the GLB has standard driver and passenger memory, so that when drivers switch, the memory setting adjusts the driver’s seat, steering wheel position (with optional power wheel adjuster) and outside mirror angle and the front passenger seat also adjusts to the new passenger’s preset preferences.
The power windows standard on both the GLB and the CX-5 have locks to prevent small children from operating them. When the lock on the GLB is engaged the driver can still operate all of the windows, for instance to close one opened by a child. The CX-5 prevents the driver from operating the other windows just as it does the other passengers.
If the windows are left open on the GLB the driver can close them all at the outside door handle or from a distance using the remote. On a hot day the driver can lower the windows from a distance using the keyless remote. The driver of the CX-5 can only operate the windows from inside the vehicle, with the ignition on.
The GLB’s power window, power lock, power mirror and cruise control switches are lit from behind, making them plainly visible and easier to operate at night. The CX-5’s power mirror switches are unlit, making them difficult to find at night and operate safely.
The GLB’s standard outside mirrors include heating elements to clear off the mirrors for better visibility. Mazda only offers heated mirrors on the CX-5 Grand Touring/Signature.
The GLB offers optional automatic dimming rear and side view mirrors which automatically darken quickly when headlights shine on them, keeping following vehicles from blinding or distracting the driver. The CX-5 offers an automatic rear view mirror, but its side mirrors don’t dim.
The GLB offers optional massaging front seats in order to maximize comfort and eliminate fatigue on long trips. Massaging seats aren’t available in the CX-5.
The GLB has a standard dual zone air conditioning allows the driver and front passenger to choose two completely different temperatures so people with different temperature preferences won’t have to compromise. This makes both the driver and front passenger as comfortable as possible. Dual zone air conditioning is only available on the CX-5 Touring/Grand Touring/Signature.
Both the GLB and the CX-5 offer rear vents. For greater rear passenger comfort, the GLB has standard rear air conditioning vents to keep rear occupants cool in summer or warm in winter. The CX-5 doesn’t offer rear air conditioning vents, only heat vents.
To quickly and conveniently keep personal devices charged without cables tangling and wearing out, the Mercedes GLB offers an optional wireless phone charging system (Qi) in the center console. The CX-5 doesn’t offer wireless personal charging.
The GLB’s optional Active Parking Assist can parallel park by itself, stopping and changing direction automatically. The CX-5 doesn’t offer an automated parking system.
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