Dead battery cannot get in the vehicle

I have a CLK 430 the battery is gone dead I tried
the key in the doors and in the trunk I can't get
them open so how am I supposed to get the hood
open are the trunk open to replace the battery or
look for a switch when you have to pull the lever
inside the car to open the hood I cannot get in my
vehicle and I have a maintenance guy here to fix a
problem with my car what the heck you spend all
this money and we can't get in our cars or we have
a dead battery they can send a man to the Moon
we can't get in our cars are luxury cars please help