Notes on AGM battery - AH54.10-P-0002-01A

WARNING: This page is about a different car, the 2011 Mercedes-Benz C300, 2010 Mercedes-Benz C300, 2009 Mercedes-Benz C300, and 2008 Mercedes-Benz C300. However, it is still accessible from the selected car via links, so may be relevant.

All models

As of Autumn 2000 new batteries with AGM technology will be used.

The external differentiation features between these batteries and conventional batteries are:

Black housing
VRLA battery labeling
Non-detachable covers (A)

Fig 1: Identifying Non Detachable Covers
Courtesy of MERCEDES-BENZ USA

AGM battery structure

Instead of the acid in a conventional battery, a conductive fabric (bonded fiber) (V) is used.

Special properties:

High cycle strength (long service life)
Improved cold starting characteristics
No escaping acid if housing damaged
Improved deep-discharge resistance
Absolutely maintenance-free

Fig 2: Identifying Conductive Fabric (Bonded Fiber)
Courtesy of MERCEDES-BENZ USA

Distinguishing features

No stop plugs
No acid level markings
No externally vented stop plugs
Information plate on the battery
If the battery is replaced, the vent hose with an elbow to one side of the battery and the stop plugs on the other side of the battery must be pressed in.