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1990 W124 300TE-24 3.4 AMG, 1991 W126 300SEL
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152 Posts
Discussion Starter #1
Hi

My speedo is out by +10 to +18km/hr. more at higher speed. Anybody had done this job before? BTW I am running a set of standard wheels and tires.

Raf
 

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1987 Mercedes 300e
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400 Posts
hmm, i would like to know to. i saw in another topic about wheels that they can just calibrate the speedometer... i haven't heard of it but ii would like to know because i have a feeling that i am going too fast.. mine says im going 40 mph down the street but it feels like high 40's... like 48ish. ideas?
 

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1987 Mercedes 300e
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400 Posts
too bad i can't edit the post.. i am driving on stock 16 inch rims seen here...

http://members.cardomain.com/cali_driver

the tires on them are Yokohoma's YK420 p215/60R15 93H

when driving i feel like i am going too fast or that the speedometer is reading too low.. any ideas??
 

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2004 SL55 AMG
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505 Posts
[8D]

I assume Benzes have electronic guts in the speedometer, which require re-programming to calibrate. Basically, a numeric constant value stored in digital memory needs to be changed to accomodate the geometry change caused by a larger/smaller diameter wheel or tire. I don't know if the programming device from Dashpro will do the job or not, but it gives you an idea of what's needed.

http://www.dashpro.com/prog.html

Cheers!
Dave
 
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