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 and force limiters to limit the pressure the belts will exert on the passengers. The Chrysler 300 doesn’t offer pretensioners for its 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 300 doesn’t offer pre-crash pretensioners.
The C-Class Sedan has a standard Post Collision Brake, which automatically applies the brakes in the event of a crash to help prevent secondary collisions and prevent further injuries. The 300 doesn’t offer a post collision braking system: in the event of a collision that triggers the airbags, more collisions are possible without the protection of airbags that may have already deployed.
Over 200 people are killed each year when backed over by motor vehicles. The C-Class Sedan offers an optional Maneuvering Brake Function that uses rear sensors to monitor for objects to the rear and automatically applies the brakes to prevent a collision. The 300 doesn’t offer backup collision prevention brakes.
Earlier warning of stopped traffic, traffic signals, dangerous road conditions, weather, or accidents, can keep driver's safer and prevent crashes. The C-Class Sedan offers optional Car-to-X Communication, a system that seemlesly communicates important warnings to the driver about impending danger, if they're available. The 300 doesn’t offer a system that can receive automated systems from infrastructure or other vehicles.
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 300 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 has a standard blind spot warning system that uses sensors to alert the driver to objects in the vehicle’s blind spots where the side view mirrors don’t reveal them. Only the 300 S/Touring L offers a blind spot warning system.
Both the C-Class Sedan and 300 offer rear cross-traffic warning, but the C-Class Sedan with Rear Cross-Traffic Alert also has Active Brake Assist (automatically applies the brakes) to better prevent a collision when backing near traffic. The 300’s Rear Cross Path Detection doesn’t automatically brake.
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 300 doesn’t offer a driver alert monitor.
Both the C-Class Sedan and the 300 have standard driver and passenger frontal airbags, front side-impact airbags, driver knee airbags, side-impact head airbags, height adjustable front shoulder belts, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, daytime running lights, rearview cameras and available all wheel drive.
A significantly tougher test than their original offset frontal crash test, the Insurance Institute for Highway Safety does 40 MPH small overlap frontal offset crash tests. In this test, where only 25% of the total width of the vehicle is struck, results indicate that the Mercedes C-Class Sedan is safer than the 300:
|
C-Class Sedan |
300 |
Overall Evaluation |
GOOD |
MARGINAL |
Restraints |
GOOD |
GOOD |
Head Neck Evaluation |
GOOD |
GOOD |
Peak Head Forces |
0 G’s |
0 G’s |
Steering Column Movement Rearward |
1 cm |
9 cm |
Chest Evaluation |
GOOD |
GOOD |
Max Chest Compression |
27 cm |
28 cm |
Hip & Thigh Evaluation |
GOOD |
GOOD |
Femur Force R/L |
.5/.4 kN |
3.7/3 kN |
Hip & Thigh Injury Risk R/L |
0%/0% |
1%/0% |
Lower Leg Evaluation |
GOOD |
POOR |
Tibia index R/L |
.3/.47 |
1.21/.58 |
Tibia forces R/L |
1.9/1.7 kN |
3/4.7 kN |
For its top level performance in IIHS driver and passenger-side small overlap frontal, moderate overlap frontal, side impact, roof strength and head restraint tests, with its optional vehicle-to-vehicle front crash prevention system, with its optional vehicle-to-pedestrian front crash prevention system, and its standard headlight’s “Good” rating, the Insurance Institute for Highway Safety grants the C-Class Sedan its highest rating: “Top Safety Pick Plus” for 2022, a rating granted to only 131 vehicles tested by the IIHS. The 300 is not even a standard “Top Safety Pick.”