There is a thread on www.benzsport.com
about the lawsuit and details about the warranty. It basically covers damage to the engine which might result from the FSS oil change cycle and the use of non-synthetic oils by dealers prior to 2001. I just took my 99 C280 in for the 45k "B" service and they used Mobil 1 (standard operating procedure). You should also be getting a certificate in the mail good for $35 off your next FSS service. I suspect the this is the figure they came up with as the differential between regular and synthetic oil. Word to the wise:If you do your own maintanance, either change it every 3 k miles or use synthetic oil, or both.