Why should the child car seat be positioned either completely against, or at least 25 cm from the back of the front seat or dashboard? (X1)

When a rear facing child car seat is in touch with the car interior, it will be supported by the car interior during an impact, which gives an optimal crash performance. When this is not feasible, it’s best to create significant distance between the interior and the child car seat to avoid an impact with the car interior when the child car seat will move during the crash. However, please note that these are recommendations for the ideal positions. If these cannot be achieved in your car, it is also fine to install it with getting as close to the ideal positions as possible.