SRS LIGHT ON HELP !

ONE DAY MY SRS LIGHT CAME ON MY 95 S420, SO I WENT TO THE DEALER GOT A DIAGNOSTIC DONE AND THEY SAID THAT ONE OF THE SENORS COULD BE BAD BUT THEY WOULD NOT TELL ME WHICH ONE. ALSO THEY SAID THERE WAS LOW VOLTAGE TO THE SRS SYSTEM. HOW CAN I FIND OUT THIS PROBLEM MY SELF. AND HOW MUCH ARE THE SRS SENSORS AND MODULES.

My 94 S 320 has a issuse w/ the SRS also. When I start it it, the SRS light stays on for about 2 minutes then goes off. Since the middle of 94, this problem has ocurred(i have all the maint. papers). Over time 2 seatbelt buckles has been replaced, but the light still is on.

Does your do something similar? I just ignore it.   T