oil change

i just bought a 1997 e320...love it.
1. i am unable to locate a maintenance manual for this vehicle-anyone know of any?
2. i feel very stupid asking this question but where is the oil filter? everything is completely encased in this vehicle.
3. what spark plugs should i be using? what gap? the guy i bought the car from just thew some crap ones in and i want to replace with new quality ones.

thanks in advance,
Mike

[JimF]

1) There's a lot of manuals for sale on Ebay. Do a search for "mercedes man*". Also can purchase one from MB at 800-367-6372.

2) I believe its on the driver's side toward the front of the engine. The little black cap.

3) The owners manual will tell you which plug is preferred.