I want to buy a set of ignition wires for my '96 C280, but when I go online to buy them, it asks which set of engine numbers does my car belong to and gives two seperate numbers (12-011794-) and (-12-011793)

Where can I find my engine number, on my car? Or could someone tell me which one I need to buy? If it helps, my car has a build date of 11/95.

Thanks