Q: Both batteries disconnected for 90 days on 2008 Mercedes-Benz SL65 AMG

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Need help. My car was placed in storage and both batteries disconnected.

I anticipate both batteries to be dead.

Can someone provide instructions on best way to go forward / will these batteries be salvageable to recharge or should I replace ... are they under warranty.

Will the dealership warranty the battery?
What will be the fault codes ... again I anticipate the car will have to be reset by the dealership.

When I travel for over 90 days in the future ... what is the best method to store the car???

thanks for the help!!!!
(1) Answer
The batteries are so new, it may be that they are okay. I'd reconnect and give it a shot--won't hurt anything, and if it does get them started, then you can jump the car. I have no idea how the dealer would treat this . . . I would ask them for help, and see what they tell you. They may cover it under warranty.

In the future, what you need is a battery tender, which is designed for keeping batteries healthy on collector cars that are driven infrequently.