I have a S500 coupe (w140). The SRS light seems to stay on longer now than it has done in the past. Instead of turning off within a minute, now it stays on for about 5 minutes. Does anyone have the same problem? My parent's S420 (w140) has the same problem. One more question, my MPG gauge is bezerk. Should I just stepp on the gas a tad, it will go to the most inefficient indicator and drop immediately. Just wondering if anyone has had the same problem. Thanks in advance.