Do you maybe mean the Dodge Caravan?
Here is an excerpt from
www.car-safety.org
Integrated Child Safety Seats. These are often touted as a safety feature, but may not be the best choice for a primary child restraint. On the plus side, they are always installed properly and they are very convenient to fold away for an adult passenger. They are certainly very safe if they fit your child properly and are used correctly. There are some important disadvantages to consider before insisting on having a built-in carseat:
* Emergency personnel often prefer to remove a child in a separate carseat. This keeps the child immobilized in case of head/spinal injury, and allows for safer transport in the ambulance.
* Integrated seats do not function rear-facing. Rear-facing is safest for children, and many aftermarket models allow for rear-facing use to 30 or 35 lbs.
* Integrated seats do not usually have any form of side impact protection. Many aftermarket seats have some form of protection, and a few have special foam or plastic specifically for side impacts. Deep wells on the side also help keep a sleeping child's head more upright.
* Harnesses on some integrated seats can be difficult to adjust, and may not fit tightly, especially on smaller children. This can lead to an unsafe fit, and make it easier for a child to remove all or part of the restraint. Some integrated seats have limited or no harness height adjustment, a feature found on most aftermarket seats. This means a child may be too tall for an integrated seat well before they exceed the weight limit.
* Using an integrated carseat as your primary restraint may leave you without a method to transfer your child to another vehicle (relative, caregiver, vehicle being repaired, etc)
* The comfort on some integrated seats is far below the level found on most aftermarket carseats. Integrated seats also tend to be less comfortable for an adult when folded.
* Optional integrated seats are often more expensive than most aftermarket child restraints.