Engine Info and best places to shop.

[criley]

Hi all,

I am a new Mercedes owner and I am looking for information to tune-up my SL. I was told by the previous owner that the engine had been replaced or redone in 2003. The accessories however look very old/used, including the wires and plugs.

I need to know what engine I have to order some parts, but I haven't a clue as to where to look on the block. Can anyone help an ignorant person here? Also, where would be the best/cheapest place to get parts for the car? I will also be getting interior items such as carpet. Thanks for the help.

1979 450 SL