Pulled the spoiler assembly of the C yesterday. Spent about 2 1/2 hours cleaning and re-greasing everything. Noticed that the motor was nearly f***ed. One of the contacts had cracked and was shorting itself out on the housing. All kinds of melted plastic and crap came spilling out when I opened it. Re-soldered the connections and insulated the contact and now it works great again. All in all about 4 hours to take out, clean/fix and throw it all back in.