Name this part - PeachParts Mercedes-Benz Forum

broken4door · #1 04-16-2012, 06:32 AM

Hello, I need your help naming the switch with the yellow arrows in the images below. What is it called or what does it do?. This belongs to a 1987 300D with 603 engine. Does anyone know what factory connector this switch goes to? It has a red wire that travels up the a switch next to Y29. I know its not Y30 engine overload protection switchover valve or Y29 Vacuum amplifier switchover valve.

pawoSD · #2 04-16-2012, 06:47 AM

Usually those micro switches are used to trigger the "idle status" of the engine. Since the 603 has an electronically managed idle that may be what it is for. On the gassers its used to signal "closed loop" at idle to the computer.

broken4door · #3 04-16-2012, 06:53 AM

Also does anybody know what this clear looking filter (Man Filter WK43/1) belongs to , or what part of the vacuum system it should be hooked up too, or what factory connecter it hooks up to?

Aquaticedge · #4 04-16-2012, 07:12 AM

I've heard talks of those filters being used to keep oil from flooding sensitive things if Vac pump failure occurs

vstech · #5 04-16-2012, 07:40 AM

yes, it's usually just a simple lawn tractor fuel filter, or a gasser clear filter, a previous owner installed in the vacuum line to show if the shutoff diaphragm has ruptured, by collecting oil spatter, gives ya time to fix the problem before it fills the climate control or some other vacuum system with motor oil...