get one of those charge through the lighter-socket chargers (they generally allow for a jump start too) and, once charged, open the trunk and get a new battery.

If you can access the engine compartment, you can also jump start from there -- there should be a positive terminal in the compartment.

__________________
Dan

1986 560SL (52.5k miles) sold 11/24/04

1987 560sl (55.6k miles)