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The speedometer doesn't work

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Old Jan 14, 2017 | 06:50 AM
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Mercedes E250 CDI 2012
The speedometer doesn't work
Hello!
The speedo on my fathers 2012 W212 doesn't work. Right know it's starts at about 290km/h. The thing is that it keeps on moving when you are driving. It happened when I was overtaking another car at about 130km/h. When slowing down the speedo wouldn't go back and it just kept in showing the wrong speed.

Been at the mechanics who couldn't figure out any faults, no errors were shown in the computer.

Any ideas?
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Old Jan 16, 2017 | 11:23 AM
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Mercedes E250 CDI 2012
So I noticed today. If I go speeds above 147 the speedo will forget where 0 is and think that 147 on the speedo is 0. So when driving 50 the speedo will show 197..

Any ideas?
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Old Jan 16, 2017 | 02:22 PM
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belarus27
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2010 e550 p2
I seen some ppl with faulty speedos on this forum , which was replaced later. I would assume u need a new one too. Or maybe reset will help.. which i doubt
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Old Jan 16, 2017 | 02:34 PM
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W204 C63 AMG, W212 E250 CGI, C207 E250 CGI
you may need a new cluster and a star to tie it up to your car. not a cheap fix. goodluck.
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Old Jan 16, 2017 | 05:27 PM
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Mercedes E250 CDI 2012
Thanks for the answers! Well ****, new speedo :/

How do I reset the car? Disconnect the battery's?
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Old Jan 16, 2017 | 05:57 PM
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Yep , try disconnecting the battery for a few mins. If it does nothing , most likely the speedo itself
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Old Jan 17, 2017 | 01:42 AM
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Mercedes E250 CDI 2012
Originally Posted by belarus27
Yep , try disconnecting the battery for a few mins. If it does nothing , most likely the speedo itself
will do, it's worth a try. Thanks!
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Old Apr 14, 2018 | 07:49 AM
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Did you ever fix this? I'm having the same issue in my 14 w218. When I go above 90 mph, the speedo gets stuck, and then gets lost completely and wanders. The dealer reset it, but it keeps happening. On restart, it sometimes resets to 0 and works. But it's almost always repeatable at around 90 mph.
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Old Apr 14, 2018 | 09:41 AM
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Mercedes E250 CDI
It solves it self when its turned off sometimes... Right now it's working fine... :/
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Old Apr 18, 2018 | 06:38 AM
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So, the delears shop forman determined that it was a bad instrument cluster and that it needed to be replaced. Hopefully that solves it.
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