Here is an inexpensive Snap-On brand "offset" boot puller that is useful in removing the plug boots:
http://buy1.snapon.com/catalog/pro_det.asp?P65=&tool=all&item_ID=10805&group_ID=1351&store=snapon-store&dir=catalog

Do a search under rjnonnie's screename. Ray has posted many
helpful DIY articles for the W210.

Rex

__________________
1998 Mercedes E320 110+k
2000 Chrysler Town & Country Limited 85+k
1972 Ford Mustang 180+k
1988 Ford Tbird Sport (gave to nephew at 245k...still going at 270+k)
1983 Ford Tbird (traded at 135k)