Hi folks,

Yesterday, I finally took out my 300DT out for a ride. It was a nice experience after all these months! I did replace the speedo cable about 4 weeks ago, so last night was the first time I saw it in action. Good news: needle does not bounce and the cable did its job. However, the speedo is off by (est w/o GPS to validate) about 10mph.

Is there some kind of adjustment screw or do I need to pay the piper and go to a VDO speedo shop?

bob

I guess Jimmy went to bed.

I love my 500SLNA, 300DT and my 300TDNA so, so much.

__________________
1985 500SL Euro w/ AMG bits 130k
1984 300SD Turbodiesel 192k
1980 240D Stick China 188k
2001 CLK55 AMG 101k
2007 S600 Biturbo 149k Overheated Project, IT'S ALIVE!!!

Tyler,

I'm missing you, amigo

Anyone else?

Thanks,
Bob

I was told that the speedo shop was the answer. New gears needed. I have not done it yet.

__________________
www.jerseyplanning.com
1987 300TD 440K - My car
2005 Jeep Grand Cherokee Laredo 107K - Tim's car
2000 - CLK320 100K - Deb's car
1994 C230 150K - Josh's Car

jfikentscher,

Thanks for your reply. Did you regear and is that why they told you that you needed new gears in the instrument cluster? As for me, I did not regear, just replaced the speedo cable.

Bob

I regeared.

__________________
www.jerseyplanning.com
1987 300TD 440K - My car
2005 Jeep Grand Cherokee Laredo 107K - Tim's car
2000 - CLK320 100K - Deb's car
1994 C230 150K - Josh's Car

i just read this:

Calibration adjusts for these variances and is done by the manufacturer, which sets up the speedometer gear to correspond with the factory-installed ring and pinion ratio and tire size. A car owner may have to recalibrate his speedometer if he makes changes that make his vehicle fall out of factory specifications (see the sidebar below). Recalibrating a speedometer can be done by manipulating the hairspring, the permanent magnet or both. Generally, the strength of the magnetic field is the easiest variable to change. This requires a powerful electromagnet, which can be used to adjust the strength of the permanent magnet in the speedometer until the needle matches the input from the rotating drive cable.

do we have a hairspring in our instrument clusters?