Over 200 people are killed each year when backed over by motor vehicles. The Jetta GLI has standard Maneuver Braking that uses rear sensors to monitor for objects to the rear and automatically applies the brakes to prevent a collision. The S4 doesn’t offer automatic braking for stationary objects directly to the rear.
The Jetta GLI 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 and moves the vehicle back into its lane. A system to reveal vehicles in the S4’s blind spot costs extra.
To help make backing out of a parking space safer, the Jetta GLI has standard Rear Traffic Alert and automatically engage the brakes. Audi charges extra for Rear Cross-Traffic Assist on the S4.
Both the Jetta GLI and the S4 have standard driver and passenger frontal airbags, front side-impact airbags, side-impact head airbags, front seatbelt pretensioners, height adjustable front shoulder belts, plastic fuel tanks, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, crash mitigating brakes, post-collision automatic braking systems, daytime running lights, lane departure warning systems and rearview cameras.
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 Jetta GLI the rating of “Top Safety Pick” for 2017, a rating granted to only 207 vehicles tested by the IIHS. The S4 has not been tested, yet.