When I dropped our w210 off to have them done (I was way too skeered to do it myself after reading the horror stories on here) I dropped it off with a new full can of deep creep, a new tube of anti-sieze compund, and all new Bosch GPs. When I picked it up- they told me they "pre-sprayed" them as I requested and let the deep creep soak, and then briefly warmed it up- and then... used a set of vice grips and get em all out (gasp). They all came out with no probs.