You need to look at your works invoice, not the service booklet, to find out what works had been done to your car when you had it in for the last B service. They may have a habit of check off all the yes columns in the service booklet, because they should not change spark plugs at 25k miles. You need to know what works will need to be done for your car at the next A service. It seems that you are driving much more than 12k miles a year, this way you will only have 1 brake and coolant flush during the 4 years/50k miles warranty. You need to be sure that you will have your brake flush at least once before your car warranty expired.
'00 E430 Brilliant Silver/Ash