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Subject: Re: Doors blown off by SL500 :(
Author: dwightf : member since February, 2004 : 8038 posts
Posted on: 2005-04-05 23:22:41

No, it’s a known fact. Do a search. Around normal driving speeds the speedo is 4-5mph above what you are going. This is because of a German law that says a car can never read under what it is actually going. So BMW accounted for wear over time. Un-fortunately, this error grows as speed increases.

Unless you have altered DINAN engine software, the car is limited to 127-132 mph. However it can register as high as 140. This would account for you saying that it kept accelerating past the limit. The speedometer is electric driven. Un-lock your OBC and display the current speed. The OBC is accurate! Then convert the KM/h to MPH. This is your true speed.


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2001 Imola Red 740iS







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