SBC pump failure and warrenty expired a day ago :(

Since it wasnt my brake sensor i decided to take it to the dealer sometime in the week.
Just by coinsidence I checked my paperwork on 11/24 for my car to findout when my 10yr warrenty is expiring and on my paperwork the warenty date was expiring on the same day 11/24/13 which was sunday. i called mercedes right away but aparently they are closed on sunday.
I made an appointment right away on monday morning and took the car in for a diagnostic. the dealor told me they will charge me a $169 diagnostic fee and if its the SBC pump then they will get with the mercedes comapny to see if they will cover the warrenty as i was a day late.
This morning i got a call from the dealor saying that the code came out positive and it is the SBC pump however they cannot make any repairs until they get an approval from the mercedes company.
At this point i am just waiting for them to let me know that they will fix my car with no charge. it wasnt my fault that on sunday they are closed or else I would have taken it to them same day.
I HOPE THEY FIX IT. its very off that it failed a week before the warrenty expiration date.
anyone had any similar experience?
any advise from you guys?

dealer said they will pickup 75% of the cost and ill have to pay 25%. so now i have to pay 550 out of pocket.
i just told them to go ahead and do it as it would probably cost me as much as this amount at a local store i guess.



