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Discussion Starter #1
On my r171 280 the lower part of the digital speed-o-meter reads in Km/h. I've read the manual on page 99 about how to set it to mp/h. Unfortunately the only option I get when I get to the 'Instrument Cluster' option is to change the language, there's no option to change the speed-o-meter units. What am I doing wrong?
 

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Administrator 2009 SLK 55 AMG/Founding Member 2006
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Have you tried a 'search' top right. I recall this subject has been discussed recently.
 

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Sadly Woolly has passed away
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. . . What am I doing wrong?
Nothing. UK Construction & Use Regs state that you must have a speedometer CAPABLE of displaying ones speed in Mph and Kph. MB have misinterpreted this and for UK cars, not only is it 'capable', it does so all the time.

I got mine changed at the factory to give the option of displaying Outside Air Temperature, but when I brought it back to the UK, my local dealer reset it back to UK spec.

I've since changed it back to displaying OAT, but, you need an MB Star diagnostic system to do this (thanks John :tu: ).
 
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