Remove the cover with the allen wrench; I think you have to remove the air intake pipe which crosses the engine first but this is like two nuts to remove. Then, lift the cover and you'll have access. THis is one of the easiest cars in the world to change plugs in because they're right on top and nothing is in the way. There are three coils and the plug boots come off as you remove them and the cover. Be gentle with them, then use a plug wrench with an extension and a ratchet, slowly and with only the amount of pressure needed loosen the plugs, once they are loose disconnect the ratchet and turn out by hand. Make sure not to let any dirt fall into the plug hole. Put new plugs in at first without ratchet, turning in by hand making sure not to strip aluminum threads. Then lightly tighten w/ ratchet. Just be careful and everything will go fine. I used Bosch Plat. 4's and nothing bad happened. Many MB mechanics will tell you the wiring harness problem wasn't so much a problem in 95 as it was in 93. Good luck.

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2002 Mercedes-Benz E320 4Matic
1995 Mercedes-Benz E320 Wagon
2005 Land Rover LR3 V8 SE
1999 Audi A8 4.2L quattro