in the trunk
e class under rear seat s-class trunk right side
charge the battery or jump it off another car
The most probable cause is the battery is exhausted.
The battery is in the trunk on the right side. You just remove it and replace it with the new one.
There are 2 where cables attach to batt. (1) pos. & (1) neg.
In the 2007 Mercedes S-Class, the consumer battery, also known as the auxiliary battery, is typically located in the trunk area of the vehicle, under the floor mat. It is positioned near the rear on the passenger side. For accessing it, you may need to remove some trim or panels to reach the battery compartment. Always refer to the owner's manual for specific instructions related to your model.
You can get the battery clamps for a class experiment at the store that sells school laboratory items.
Not all E-class have two batteries, for the ones that do, one is under the hood and the other is in the trunk.
read somewhere that the s-class has a self-leveling mechanism that continues to function even when parked with the motor off. if you park in a windy area and your car is continually jostled by the wind, that mechanism keeps compensating and uses up power. also, practically all functions of the s-class (w220) is powered by the battery (self-closing doors, adjustable chassis height, memory settings on all seats, parking sensors, even the headrests, etc). the s-class comes equipped with an oversized battery but i guess, its reserves get used up pretty quickly just the same. also, try topping up your battery water every 6 to 9 months - even if it's supposed to be a sealed battery. you can access the cells by using a large coin to unscrew the covers. that alone should extend your battery life by at least a year or two. rols
The battery to your E class is located under the rear seat. There are two "clips" that are located on the sides of the rear seats, pull those to access the battery.
should have back up capacitors, allow one or two unlock. if its dead beyond this you may need to contact dealer. The computer key for the s class has an actual key incorporated in it allowing the car to be unlocked manually.
Under passenger seat