I have a 2004 SL600 (R230) and both my starter and electronics battery are dead because of age, the cold weather, and I let it sit too long. I took the starter out with ease. I had NTB check it and they said it was dead and could not be recharged (I had tried before hand to charge it for an hour with a car jump and also a plug in battery charger). I bought a new one for MB parts dept and have not put it in yet because I want to get a new electronics battery. It was going long before the starter.

Anybody know how to take out the Electronics Battery? It's well bolted down and I removed every bolt that I could see and the retaining clip, but it will not budge. Any tips on taking it out?

Also, I bought an MB battery for the starter because I could not find the equilvalent at autoparts stores. Are the generics okay for the electronics battery as long as the size and CCA are the same?

Thanks in advance