PeachParts Mercedes-Benz Forum - View Single Post

LUVMBDiesels · #2 02-26-2008, 02:14 PM

First of all speedometers are designed for the differential gear ratio. Are both speedometer made for the same ratio? There should be a sticker or stencil onthe back of the gauge that has the ratio look for something that says 2.88 or 3.07 etc. What size tires does the car have? It could be that the outside diameter is the same between say a 14 and 15 inch rim size if the 15 inch is a lower profile tire. If the speedometers are designed for the same gear ratio and the tire diameters are close you should be OK. If the speedometers are for different gear ratios, you can get an adapter that will go on the transmission sender or you can have the speedo rebuilt. There are places that specialize in MB (VDO) units.