Mine is the same.  It's the best system I've seen yet, to prevent gascap loss.
 Incidentally, the VW key guy at the last show was cutting me a new key and told me that VW never made a gascap that used the ignition/ door key; it was 'always' a smaller, different key.  I told him he's wrong about that, but he refused to believe me. He thinks it can't be a original gascap, but mine definitely is.
  Between the two of us (and more?), I wonder if he can be convinced otherwise?

Mike B.
  ----- Original Message ----- 
  From: Bob Stevens 
  To: vanagon@GERRY.VANAGON.COM 
  Sent: Saturday, August 15, 2009 3:01 AM
  Subject: Re: Alternative to locking gas cap?

  .... my gas cap key IS my ignition key. I've tried but the key won't fit
  into the ignition while it's in the gas cap .... and the gas cap won't go
  back onto the filler spout unless the key is in it, and then locked to
  remove the key. All very well, and SIMPLY thought out by "them".
  bob

  On Fri, Aug 14, 2009 at 12:06 PM, Allan Streib <streib@cs.indiana.edu>wrote:

  > I keep my gas cap key on the same ring as the ignition key, then I don't
  > leave the cap behind by mistake.
  >
  >
  > On Fri, 14 Aug 2009 10:53 -0400, "Matt Sutton" <msutts@EARTHLINK.NET>
  > wrote:
  > > Hi Folks,
  > >
  > > Somehow, I managed to lose my gas cap. Is there an aftermarket
  > > alternative?
  > > I'd actually prefer to have a non-locking one; the idea of losing a gas
  > > cap
  > > key and not being able to fill up is too annoying to contemplate.
  > >
  > > Thanks,
  > >
  > > Matt Sutton
  > > 88 GL
  > > Brooklyn NY
  >