Since the weather has gotten colder here in WI I noticed that my e320 isn't cranking quite as well as it did in the warmer weather and since I have no idea when the current battery was new (I purchased the car 03/05) I am thinking of replacing the battery. I searched the optima site and they do not list a compatible battery for this car...so I went to the interstate site and they recommend a

MTP-91 (700 CCA 85 mo. warranty)

Is this battery a good choice? or should I go with something else?

BTW: I searched the archives but couldn't find any recommendations for the m104 e320.

TIA!

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Daily Driver: 02 E430 4MATIC
In the family: '03 E500 // '04 ML500 // 64 220SE