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#1
05-19-2007, 06:08 AM
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Will a gas speedo work in a diesel?
One of my 124's needs a new speedo, it has a broken odometer. I can get a speedo for $25 from a gas 300E 124. My thoughts are that it would work as the rear end ratio and speedo drive gear in the tranny are not changing. What is wrong with my conclusion?
__________________
 Muleears '07 E320 Bluetec 133K my DD '04 Jaguar XJ8 VDP, 34K '10 Hyundai Accent 60K Grocery Getter '02 VW Golf soon to be on the road again '97 E300 Diesel Son's DD '61 VERY tolerant wife Hampton Roads, VA USA Gone but not forgotten: '67 250S 95K '86 300SDL '87 300D Turbo, 364K! R.I.P. '98 E300 Turbodiesel, 213K '02 S420, 164K '01 Prius 138K 
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#2
05-19-2007, 07:47 AM
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You're right, it will work fine.
__________________
-diesel is not just a fuel, its a way of life-  '15 GLK250 Bluetec 118k - mine - (OC-123,800) '17 Metris(VITO!) - 37k - wifes (OC-41k) '09 Sprinter 3500 Winnebago View - 62k (OC - 67k) '13 ML350 Bluetec - 95k - dad's (OC-98k) '01 SL500 - 103k(km) - dad's (OC-110,000km) '16 E400 4matic Sedan - 148k - Brothers (OC-155k)
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#3
05-19-2007, 10:31 AM
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I'm not sure. The rear gears in your 300D (2.65:1) are much lower (numerically) than a 300E.
That might be addressed by the speedo gear on the transmission end of the cable, and the speedos might be the same then. Look at the small part number printed in white in the face of the speedo itself (not the cluster, just the speedo) and compare it to the numbers of your speedo. What's wrong with your speedo? If all else fails, I'm considering parting with my spare, ... I've grown comfortable with having spare parts around though.
__________________
 Gone to the dark side - Jeff
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#4
05-19-2007, 12:12 PM
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I have 2 speedo's in the garage from 300 diesels, What part number are you looking for, if you want it, it's free. Chuck
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2000 C230 Kompressor "Frosty" 2007 PT Cruiser 2001 VW TDI Beetle 1999 Landrover Discovery II 1971 Corvette Gone: 97 Cabrio, 83 240D, 93 VW Eurovan, 95 Volvo 850, 93 Chevy Astro Van, 77 VW Bus, 99 VW Jetta, 74 VW Bus
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#5
05-19-2007, 01:13 PM
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The speedo will work but because the gasser uses a different rear end ratio, it will show miles and speed incorrect.
If it's not cable driven (I believe all the W124's are electronic), you can send it out to be reprogrammed to correct for your ratio.
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#6
05-19-2007, 01:56 PM
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It's cable driven.
__________________
Gone to the dark side - Jeff
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#7
05-19-2007, 02:39 PM
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ny
Quote:
__________________
Ich liebe meine Autos! 1991 Mercedes-Benz 560SEL | Megasquirt MS3-Pro | 722.6 transmission w/ AMG paddles | Feind Motorsports Sway Bar | Stinger VIP Radar | AntiLaser Priority | PLX Wideband O2 | 150A Alternator | Cat Delete 1981 Mercedes-Benz 300SD | Blown engine, rebuilding someday... 1981 Mercedes-Benz 300SD | Rear ended, retired in garage. 2009 Yamaha AR230HO | Das Boot Excessive speeding? It ain't excessive till I redline!
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#8
05-19-2007, 02:53 PM
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N41ef
Sent you a PM
__________________
Muleears '07 E320 Bluetec 133K my DD '04 Jaguar XJ8 VDP, 34K '10 Hyundai Accent 60K Grocery Getter '02 VW Golf soon to be on the road again '97 E300 Diesel Son's DD '61 VERY tolerant wife Hampton Roads, VA USA Gone but not forgotten: '67 250S 95K '86 300SDL '87 300D Turbo, 364K! R.I.P. '98 E300 Turbodiesel, 213K '02 S420, 164K '01 Prius 138K
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#9
05-20-2007, 09:39 PM
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I believe I have one, came with some parts I bought, PM me the number on the SD gauge face and I'll check.
Quote:
__________________
Gone to the dark side - Jeff
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