If your dealer (or any shop) is willing to give you a price upfront to do it and willing to eat the time it would take to extract it if it broke then it is worth having them do it. I would ask your dealer what happens if the GP breaks while their tech is trying to pull it...if they say "then the clock starts over" I would DIY it and take my chances...worst case is you break it off and pay them to fix it.

__________________
Marty D.

2013 C300 4Matic
1984 BMW 733i
2013 Lincoln MKz