listerone

Just curious...how many batteries does the '11 E350 Sedan have and where is it (are they) located?

Diesel Benz

From 6/2010 onwards all models should have the main battery at the engine compartment. Cars with the 273 engine used to have the main battery at the trunk.

W212 does not have a second battery except cars with ECO start/stop feature have one and all cars with the steering column gear shift have a small backup battery (hidden at the left side of the driver's footwell.