The front passenger seat can also be fitted with automatic child seat recognition, which now works by a weight mat, enabling any child seat to be used. (paultan.org)
Another new feature was electronic child seat recognition in the passenger seat. (mercedes-benz.com)
The SLK has features the Z3 doesn't yet offer but probably will, like side airbags and a «child seat recognition system» to keep the passenger - side airbag from firing; and standard features that are optional on the Z3, like traction control and leather upholstery. (articles.orlandosentinel.com)