for any additional charges that may come up. It may be a limited warranty so you will only get credit for the balance of the mileage left on the tire or warranty.
I did the same thing as Kerry on a battery and then pulled the checkbook out to pay the balance on the bill. As soon as I opened it I realized my folly and quietly folded it back up while going for the money clip.
Duh...

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'99 S420 - Mommies
'72 280SE 4.5 - looking to breathe life into it
'84 300SD Grey - Sold
'85 300SD Silver - Sold
'78 Ski Nautique