Hi!

This might be a dumb question - I went out to do the first oil change on my 88 Wolfsburg this past weekend and was met with a small obstacle.  The oil drain plug had been switched out to a 19mm, and with the recessed location I was unable to get a socket to actually grip the bolt to remove it.  I spoke to the PO and he told me that he had went to the dealership for a replacement and that this was given to him.  He thought it was brilliant German engineering to prevent over-tightening.  This may be the case, but I can't get it off.  The recessed location prevents a wrench from getting a hold of it, and a socket simply won't grab it since only a small fraction of the bolt is accessible.  The bolt itself has been beat up pretty bad from the PO's struggles to remove it, but it's still got the edges.  I have been to Home Depot and True Value and can't find a socket that looks any better or different than the craftsman I own.  

Any ideas?  Is this really a dealership decision, or is the wrong plug?

Thanks!
Paul