Hi, Saravanan
Can you be a bit more specific on what you want to be included in this full car simulation of yours? The motor, gearbox and driveline etc? Or just the car suspension?
On the SystemModeler website, there are many downloadable models concerning automotive applications. You will find them under Automotive & Transportation.
The if the motor and gearbox are of interest, the example called "Driveline" could be of interest to you. There is also a model dealing purely with suspension, comparing acitve and passive suspensions.
