Superchips Doesn't Remove Speed Limiter
 

Well, we found out on the Nevada desert roads that the Superchip EPROM hasn't removed the top-speed limiter on our E500. Did four runs on a seven-mile stretch of straight road and consistently ran up to a GPS-measured 157 mph before hitting a limiter at 6000 rpm. With more revs and no limiter, I feel the car would run out of horsepower at about 165 mph.

Sadly, after the top speed tests the car mysteriously went into limp-home mode and spent a week (Sat. to Sat.) at the Las Vegas dealer, Fletcher Jones, before they diagnosed a failed alternator. I don't know about anyone else, but a week in Las Vegas is four days too long for me! :mad:

Many thanks to the other participants in the Silver State Classic who offered us another vehicle and trailered our car back to town. Also, kudos to M-B's roadside assistance program for providing the four hour tow to Las Vegas. :)

I hope they also cover the car rental, but that's another story ;)

My understanding is that the EPROM can't remove the speed limiter as a different computer than the one it's installed in controls that function...or something like that...