Just went to install a car seat in the back of my 2007 B Class W245 to find out it isn't suitable.... The rear seats have such a steep decline on the seated part that the child seat ends up putting the baby at an angle that is too upright, it needs to be 45 degree incline max. Seems these rear seats are a major problem! Then spent an hour at Mothercare trying different car seats with ISOfix bases to find none of them fitted properly. We even tried just using the baby car seats on their own without the ISOfix base just using seatbelt but still no joy. Anyone else had this problem?