Shocks and Struts?

How do I know when the shocks and struts need to be replaced on my 1994 Lincoln Continental Executive Series? How much does it usually cost? Please respond ASAP. Thanks.

Your vehicle has Air Ride Suspension controled by a computer module and height sensors that automaticaly level the car and adjust to road conditions. You do not have shocks present on the vehicle. The suspension consists of 4 Air Struts(one per wheel), that exist as a single unit. You will know when the struts are bag because the car will sag noticeably. The struts from a dealer are quite expensive, however there are several aftermarket companies that carry the same struts at a lower cost. Are you having problems with your vehicles suspension now, or just inquireing? If you have any more questions please feel free to send me a PM and I will be glad to help.