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For enhanced safety, the front and rear seat shoulder belts of the Mercedes C-Class Sedan have pretensioners to tighten the seatbelts and eliminate dangerous slack in the event of a collision. The Alfa Romeo Giulia doesn’t offer pretensioners for the rear seat belts.
The C-Class Sedan’s pre-crash front seatbelts will tighten automatically in the event the vehicle detects an impending crash, improving protection against injury significantly. The Giulia doesn’t offer pre-crash pretensioners.
For enhanced safety, the front seat shoulder belts of the Mercedes C-Class Sedan are height-adjustable to accommodate a wide variety of driver and passenger heights. A better fit can prevent injuries and the increased comfort also encourages passengers to buckle up. The Alfa Romeo Giulia doesn’t offer height-adjustable seat belts.
The C-Class Sedan offers an optional Surround View System to allow the driver to see objects all around the vehicle on a screen. The Giulia only offers a rear monitor and front and rear parking sensors that beep or flash a light. That doesn’t help with obstacles to the sides.
The C-Class Sedan’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 Giulia doesn’t offer a driver alert monitor.
The C-Class Sedan has standard Mercedes-Benz Emergency Call, which uses a global positioning satellite (GPS) receiver and a cellular system to get turn-by-turn driving directions, remotely unlock your doors if you lock your keys in, help track down your vehicle if it’s stolen or send emergency personnel to the scene if any airbags deploy. The Giulia doesn’t offer a GPS response system, only a navigation computer with no live response for emergencies, so if you’re involved in an accident and you’re incapacitated help may not come as quickly.
Both the C-Class Sedan and the Giulia have standard driver and passenger frontal airbags, front side-impact airbags, driver knee airbags, side-impact head airbags, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, daytime running lights, rearview cameras, available all wheel drive, lane departure warning systems, blind spot warning systems and rear cross-path warning.
The C-Class Sedan’s corrosion warranty is 1 year longer than the Giulia’s (5 vs. 4 years).
There are over 2 times as many Mercedes dealers as there are Alfa Romeo dealers, which makes it much easier should you ever need service under the C-Class Sedan’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 C-Class Sedan’s reliability 26 points higher than the Giulia.
The AMG C 43 Sedan’s standard 3.0 turbo V6 produces 105 more horsepower (385 vs. 280) and 78 lbs.-ft. more torque (384 vs. 306) than the Giulia’s 2.0 turbo 4 cyl.
On the EPA test cycle the C 300 Sedan 4MATIC gets better fuel mileage than the Giulia Q4 (22 city/33 hwy vs. 23 city/31 hwy).
The C-Class Sedan has 2.1 gallons more fuel capacity than the Giulia (17.4 vs. 15.3 gallons), for longer range between fill-ups.
In its Green Vehicle Guide, the U.S. Environmental Protection Agency (EPA) rates the Mercedes C-Class Sedan higher (5 out of 10) than the Alfa Romeo Giulia (3). This means the C-Class Sedan produces up to 16.5 pounds less smog-producing pollutants than the Giulia every 15,000 miles.
A nine-speed automatic is standard on the Mercedes C-Class Sedan, for better acceleration and lower engine speed on the highway. Only an eight-speed automatic is available for the Giulia.
For better stopping power the AMG C 43 Sedan’s front brake rotors are larger than those on the Giulia:
AMG C 43
The C-Class Sedan’s standard front and rear disc brakes are vented to help dissipate heat for shorter stops with less fading. The rear discs on the Giulia are solid, not vented.
The C-Class Sedan stops much shorter than the Giulia:
70 to 0 MPH
Car and Driver
60 to 0 MPH
The C-Class Sedan’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 Giulia doesn’t offer drift compensation steering.
The AMG C 43 Sedan handles at .93 G’s, while the Giulia Ti Q4 pulls only .79 G’s of cornering force in a Car and Driver skidpad test.
The C 300 Sedan executes Motor Trend’s “Figure Eight” maneuver 1.4 seconds quicker than the Giulia Ti (25.7 seconds @ .71 average G’s vs. 27.1 seconds @ .66 average G’s).
For better maneuverability, the C-Class Sedan’s turning circle is .7 feet tighter than the Giulia’s (36.8 feet vs. 37.5 feet).
The front grille of the C-Class Sedan uses electronically controlled shutters to close off airflow and reduce drag when less engine cooling is needed. This helps improve highway fuel economy. The Giulia doesn’t offer active grille shutters.
The C-Class Sedan has .1 inches more rear legroom and 1.4 inches more rear shoulder room than the Giulia.
The C-Class Sedan has a larger trunk than the Giulia (12.6 vs. 12 cubic feet).
With its sedan body style, valet key, locking rear seatbacks and remote trunk release lockout, the C-Class offers cargo security. The Giulia’s non-lockable remote release defeats cargo security.
A standard locking glovebox (which can’t be accessed with the valet key) keeps your small valuables safer in the C-Class Sedan. The Giulia doesn’t offer locking storage for small valuables.
To make loading and unloading groceries and cargo easier when your hands are full, the C-Class Sedan’s power trunk can be opened or closed just by kicking your foot under the back bumper, leaving your hands completely free. The Giulia doesn’t offer a power or hands-free opening trunk.
Unlike the driver-only memory seat and mirrors in the Giulia, the C-Class Sedan offers an optional passenger memory, so that when drivers switch, the memory setting adjusts the driver’s seat, steering wheel position and outside mirror angle and the front passenger seat also adjusts to the new passenger’s preset preferences.
The C-Class Sedan offers an optional heads-up display that projects speed and navigation instruction readouts in front of the driver’s line of sight, allowing drivers to view information without diverting their eyes from the road. The Giulia doesn’t offer a heads-up display.
If the windows are left open on the C-Class Sedan 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 Giulia can only operate the windows from inside the vehicle, with the ignition on.
A power rear sunshade is optional in the C-Class Sedan to help block heat and glare for the rear passengers. The Giulia doesn’t offer a rear sunshade.
When the C-Class Sedan is put in reverse, the passenger rearview mirror tilts from its original position. This gives the driver a better view of the curb during parallel parking maneuvers. Shifting out of reverse puts the mirror into its original position. The Giulia’s mirror doesn’t automatically adjust for backing.
Optional air-conditioned seats in the C-Class Sedan keep the driver and front passenger comfortable and take the sting out of hot seats in summer. The Giulia doesn’t offer air-conditioned seats.
To quickly and conveniently keep personal devices charged without cables tangling and wearing out, the Mercedes C-Class offers an optional wireless phone charging system (Qi) in the center console. The Giulia doesn’t offer wireless personal charging.
The C-Class Sedan’s optional Active Parking Assist can parallel park or back into a parking spot by itself, with the driver only controlling speed with the brake pedal. The Giulia doesn’t offer an automated parking system.
The Mercedes C-Class comes in coupe, convertible and sedan bodystyles; the Alfa Romeo Giulia isn’t available as a coupe or convertible.
The C-Class Sedan was chosen as one of Automobile Magazine’s “All Stars” in 2015. The Giulia has never been an “All Star.”
The Mercedes C-Class outsold the Alfa Romeo Giulia by over five to one during the 2018 model year.
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