Fits the following: All W116 W123 and W126 Chassis Diesels from 1977-1985. This is a brand new Genuine Mercedes Steering lock vacuum shut-off valve that is located on the back of your ignition lock assembly. We include 2 pieces of correct sized rubber vacuum hose as shown.
Product Details
The vacuum lines that control your engine shutoff go from the engine compartment to this valve at the lock assembly. If you are having problems with the car not shutting off this could be the culprit!
The under-dash vacuum switch looks like this and is located under the dash on top of the steering lock. You will need to remove the steering lock to replace it. General instructions are included to help you remove the steering lock. Be sure to replace the vacuum hose. WARNING: DO NOT SWITCH THE HOSES OR YOUR ENGINE WILL NOT START RIGHT AFTER TURNING IT OFF. Keep track of which nipple goes to which hose color. If you loose track, the hose coming from your vacuum source needs to go into the bottom nipple.
We recommend you install a see-through protection filter to keep oil out in the future. See related products below.
Related Products:
1977 to 1985 Diesel Fuel Shut Off Inspection and Switch Protection Filter
Connect this small filter with attached hoses to the back of the injection pump and to the brown plastic vacuum line going to your ignition switch under the dash. The filter will do two things. 1. Help to trap oil coming out of a leaking shutoff valve before it gets to your ignition switch. 2.
W123 W116 W126 Diesel Engine Vacuum Fuel Shutoff Valve w/ Extras
If your diesel engine is starting to shut off very slowly or maybe not at all and you know your vacuum system is ok, it may be time to replace the vacuum fuel shut-off valve located at the rear of the injection pump.