I've got an '04 4.8is. My full warranty is up in a few months. The full warranty includes full maintenance coveage (i.e, brakes, hoses, etc). I have a CPO warranty for another 2 years, but the CPO warranty does NOT include maintenance items. So, my dealer tells me that I have the option to extend the "full maintenence" part of my full warranty to last the life of the CPO warranty (i.e., 2 more years). The cost is $1600. Is it worth it?

Thanks.

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'04 TT cab (x73, short shifter) and '04 X5 4.8is
'07 Escalade ESV