No longer available new from Mercedes-Benz. We have field tested this for over six months with 100% success. The feedback is the throttle linkage is silky smooth. Better than OEM. It's easy to assemble, and you reuse part of the old linkage from the car. A tool is given that must be used to mount the metal plate to the new ball. Very simple. Two sealed bearings are supplied with the part. 123 300 13 40: Fits from 1977-1985 Diesel 123 chassis vehicles. Fits both Naturally Aspirated and Turbo Models.

The picture on the left is the kit we supply. The picture on the right is the kit installed with your original parts.

There are potentially two gears that can go bad. First is the gear on the side of the speedometer. If your gear is metal, then you will not need this gear. If it is plastic, inspect closely where the shaft comes through the gear as there will generally be a hairline crack, and the gear must fit tight. Most common are 18 or 29 tooth counts.

The second is the lead gear on the same rail. Check to make sure it is tight on the shaft. Using a small screwdriver, see if it spins on the shaft. If it does, you should replace this gear as well. There are three sizes. All you need to do is measure the overall thickness.