Beetle-to-Go
I don't know if it's a diesel, but it's a bit unusual.
I was 'mucking about' in the TearJerkers' web site (for/by teardrop trailer aficionados) and spotted this.
<http://www.fototime.com/ftweb/bin/ft.dll/detailfs?userid={4A739671-81EE-4F0C-BBB7-23C94895EEB3}&ndx=41&slideshow=0&AlbumId={7FD887B9-797C-4B96-B8A8-B70A7F320BC6}&GroupId={2BA6BD29-1AC5-48D2-B67F-75CD74675105}&screenheight=800>
Thought it might be of interest; hope it opens.
BG
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Sorry, the URL worked for me the first time I tried it, but failed thereafter. It led to a photo of a teardrop trailer hitched up to a fairly recent bright red beetle. If you want to go look for it, it was in among photos from a recent TJ tri-state meet, accessible from the web-site that does come up. (Minimalist camping at its best!!)