AFTER CHECKING WITH THE DEALER THEY SAID THEY REFERED TO SERVICE BULLETIN THAT YOU MENTIONED, AND THAT WAS THE SERVICE THEY PERFORMED. THEY ALSO SAID THAT MY 300 HAD BEEN UPDATED TO THE NEW COMPUTER CONTROL BOX I.E. THE ONE THAT IS LOCATED ON THE RIGHT HAND FIREWALL.COULD THIS HAVE GONE BAD I UNDERSTAND THEY COST ABOUT $800. IDONT MIND PAYING THIS IF IT WILL FIX THE PROBLEM. WHAT IS YOUR BEST GUESS.THAKS FOR YOUR H E L P .GREGHSKJ 300 SL