What battery is this?

[AC123]

Hi

Need to replace the boot battery in my SL500. Loathed to pay dealer prices so wonder whether anyone can tell me what battery it is so I can get one from a local motor factors?

Thanks

[AC123]

Hi

It's not fitted with start stop or anything like that - this (I believe) powers all the electrics in the car though.

What would happen if a normal lead battery was used? I could do with saving money if possible, but if it's going to knacker something than it's obviously a daft thing to do.

Thanks