Date registered: Sep 2011
Vehicle: 2011 E350 sport
Location: Abilene TX
Mentioned: 0 Post(s)
Quoted: 1 Post(s)
No mention of the battery type in the 2011 owners manual. After a lot of checking around on this site and battery vendors sites it seems many Mercedes, BMW's, Audi's etc. use the same size battery; a group 49 size. Various vendors list Rayovac SLI49H8M ($135), Deca 9AGM49 ($170) and Interstate MTP-H8A ($222) for use in the E350. These batteries have warranties for 5-6 years.
I have a Sears AGM in my Chrysler and it quit after 1 year. Sears gave me a new one for free. It has been in the car for 2 years and is going strong.
The service guy at Sears pointed out that AGM's need a low amp charger. The fast chargers used in most gas stations will ruin an AGM battery.