I'm at 13K with my 05 500 and have scheduled A service for later today. However, my FSS doesn't call for service untile 1500 miles later. Problem is that the manual conveniently skips what to do if the the FSS service call conflicts with the 13K service interval. Specifically, the manual calls for 13K. Do I just ignore the FSS call and stick with what the manual recommends (that's what I've done for now), or stick with FSS like I have been doing for the past several years with my E and my former ML320?