isofix

Hi, we are looking for a Mercedes stage 2 child seat with transponder to fit our w210. The car is y2000 so no Isofix but am told there is no way to turn off the passenger airbag without the transponder. It will only be used for occasional trips when we need to put our son in the front seat...

I have just purchased a 2004 (54) CLK 270 and as a new grandfather need to get the Grandson out with his Grandparents on some hopefully sunny days this summer. I have read that Isofix is the best option for fitting child car seats to the car. Can anyone tell me if they can be fitted to my car...