Absolutely, before buying verify the Bosch CIS connectors. I bought this one, but it doesn't have the Bosch connectors. OTOH if you need two gauges to trouble shoot some parts of the CIS like Jim Bailey suggested, it might make a good number two gauge.
I would have plenty of rags and maybe a bag of kitty litter to deal with the spills.
http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=92699
I think some like this one from JC Whitney. (image is wrong, review says its cis).
http://www.jcwhitney.com/autoparts/ItemBrowse/c-10101/s-10101/p-100000160266/mediaCode-ZX/appId-100000160266/Pr-p_CATENTRY_ID:100000160266