Thanks Weasel!
Can you please enlighten me about AGM battery? What is AGM stand for anyway?
Is it the same like those maintenance free drycell battery in the States?

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E70 MY08 3.0si Space Grey, Sport steering wheel, Titanium Grill, Titanium lower grill, Sidestep, and more to come

E60 MY05 525i SE Silver Grey, M5 mirrors, Hartge Classic II 20", Eibach Spring, M Sport Trunk spoiler.