123 116 126 Diesel 3/2 Way Vacuum Valve White at Valve Cover

This special vacuum switching valve is found on most Mercedes diesels from 1980 to 1985. 240D, 300D, 300CD, 300TD and 300SD. Some 85 models do not use this type of valve. On most turbo diesel engines there are two of these located under the black plastic cover on the center top of the valve cover. Most of the time you will find the lever arms worn off. Others may be full of vacuum leaks due to heat and age.

These valves control important functions related to the EGR valve and the automatic transmission. If yours look aged or worn I would recommend you replace them