rev counter 1990 300D w124 saloon

prospero

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I can see that there have been previous discussions about this, but I can't see any reply that is confident about the location of the rev counter sensor? The R/C failed after some faltering and I dont know if that is some thing wrong inthe cluster , or if it is the sensor. Any help appreciated- Where is the sensor on this model?? many thanks! :(
 

Number_Cruncher

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Your Mercedes
1995 W124 E300D TE
The sensor counts teeth on the flywheel.

Part 451

http://www.detali.ru/cat/oem_mb2.as...GM=717.433&CT=M&cat=503&SID=15&SGR=105&SGN=03

If the sensor failed, you would also find that idle speed control would be less smooth, and the EGR would no longer be working correctly. The signal for the tacho doesn't come straight from the sensor, it is actually provided by the idle speed & EGR controller.

This controller is powered by the OVP.
 
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prospero

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Thanks for this- the link is very helpful -I'll check it. Er, where's the EGR controller please?. Is there any common reason for these to fail (about 180,000 miles)/ thanks again for your help -nothing about it in haynes!
 

television

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2002 SL500, 216 CL500, all fully loaded
The best I can do is to send you the 124 tach retro fit and I have emailed it to you, it shows where everything is
 
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prospero

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Ok checked EGR connections and fuse at OPV and sensor. nothing obvious adrift still not working. thanks for your help with it.
 

television

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The rev counter is only a meter movement, that could be at fault
 
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prospero

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Thanks Malcolm , ill take out the cluster and have a look behind there when I have a moment.
 

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