I have my V1 hardwired in the SLK up top by the rear view mirror. I don't have the little unit installed, waiting to do that once I pick up the M3. I'll post a pic later today. It's not all that concealed, but I wouldn't want it anywhere where it can't pick up accurate readings being blocked by something.
Looking forward to everyone else's ideas aswell.
Soon to come??
09' C63 AMG
09' MB SLK 300 AMG Series (sold)
95' BMW 318iC Boosted (sold)