Britax MARATHON 70 Manual De Usuario

seats. See pages 8 – 13 for more information.

*  If your vehicle seat belt system includes a locking feature, 

use of the lock-offs is not required as long as the vehicle seat 

belt system is locked. Check your vehicle owner’s manual 

to determine how to lock your vehicle seat belt system when 

installing a child restraint.

*  When properly installed in the rear-facing 

position, the back angle of the child seat 

should be at least 30˚ for children and up 

to 45˚ from vertical for infants unable to 

maintain head and neck control (not to 

exceed 45˚) when the car is parked on a 

level surface. Use the blue line as a guide to 

achieve the proper recline angle for rear-

facing installations. The blue line will be parallel to the ground 

when the child seat angle is at the center of the angle range (30 

– 45˚). If necessary, the proper recline angle can be achieved by 

placing a rolled towel or pool noodle in the vehicle seat bight.

Rear-Facing Installation