I have a 1994 E420.

What tools do I need to take the valve cover screws out, back by the fire wall?

I cant get in there, space is to tight.

Help.

Probably a wiggle (u-joint adapter) on the socket extension.

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1/4 drive socket set
http://www.google.com/search?um=1&hl=en&rls=com.microsoft%3Aen-us&biw=1260&bih=859&tbm=isch&sa=1&q=1%2F4+drive+socket+set&btnG=Search&oq=1%2F4+drive+socket+set&aq=f&aqi=&aql=&gs_sm=s&gs_upl=46281l51047l0l9l9l1l4l0l1l235l611l0.3.1

1/4 drive extension
http://www.google.com/search?um=1&hl=en&rls=com.microsoft%3Aen-us&biw=1260&bih=859&tbm=isch&sa=1&q=1%2F4+drive+extension&btnG=Search&oq=1%2F4+drive+extension&aq=f&aqi=&aql=&gs_sm=s&gs_upl=98859l102515l0l9l9l0l8l0l0l125l125l0.1


1/4 drive metric swivle socket.
http://www.google.com/search?hl=en&sugexp=ldymls&pq=1/4+drive+swivle+socket&xhr=t&q=1/4+drive+metric+swivle+socket&cp=17&qe=MS80IGRyaXZlIG1ldHJpYyBzd2l2bGUgc29ja2V0&qesig=J23ii-xtp6RTxbFjfzENGw&pkc=AFgZ2tk3upMwAsgpSVfCrX8CcCTIeOeAM_fP5R6dmGImk8XnA78M4Moaud1TfIu5mWIj9AqS8I90wIJVSVDZpGqrA4OXpCCg bA&rls=com.microsoft:en-us&bav=on.2,or.r_gc.r_pw.&biw=1260&bih=859&wrapid=tljp1307888876937012&um=1&ie=UTF-8&tbm=isch&source=og&sa=N&tab=wi

1/4 drive swivle torx socket
http://www.google.com/search?um=1&hl=en&rls=com.microsoft%3Aen-us&biw=1260&bih=859&tbm=isch&sa=1&q=1%2F4+drive+swivle+torx+socket&btnG=Search&oq=1%2F4+drive+swivle+torx+socket&aq=f&aqi=&aql=&gs_sm=s&gs_upl=56672l56672l0l1l1l0l0l0l0l140l140l0.1



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1985 300SD
1983 300D
2003 Volvo V70

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Just plain hand tools. Just did it recently. You may also want to replace the spark plug well seals and the seals on each bolt.