Both the V90 Cross Country and E-Class All-Terrain Wagon have child safety locks to prevent children from opening the rear doors. The V90 Cross Country has power child safety locks, allowing the driver to activate and deactivate them from the driver's seat and to know when they're engaged. The E-Class All-Terrain Wagon’s child locks have to be individually engaged at each rear door with a manual switch. The driver can’t know the status of the locks without opening the doors and checking them.
The Volvo V90 Cross Country offers optional built in child booster seats. They’re more crash worthy than an added child seat because of their direct attachment to the seat. Mercedes doesn’t offer the convenience and security of a built-in child booster seat in the E-Class All-Terrain Wagon. Their owners must carry a heavy booster seat in and out of the vehicle; V90 Cross Country owners can just fold their built-in child seat up or down.
The V90 Cross Country’s standard lane departure warning system alerts a temporarily inattentive driver when the vehicle begins to leave its lane and gently nudges the vehicle back towards its lane. A lane departure warning system costs extra on the E-Class All-Terrain Wagon.
Both the V90 Cross Country and the E-Class All-Terrain Wagon have standard driver and passenger frontal airbags, front side-impact airbags, driver knee airbags, side-impact head airbags, front and rear seatbelt pretensioners, height adjustable front shoulder belts, four-wheel antilock brakes, all wheel drive, traction control, electronic stability systems to prevent skidding, crash mitigating brakes, post-collision automatic braking systems, daytime running lights, blind spot warning systems, around view monitors, rear cross-path warning and driver alert monitors.