I noticed a vacuum line with a plug in it ty-wrapped to the engine on the passenger side rear of the engine. Could that be a vacuum line for diagnostics?
Anybody know?

 

2007 CLK550 Coupe, 2015 Ford Focus, 2012 C350 4-Matic you are in the wrong section

 

I forgot to mention the 2003 CL600

 

here you go

 

Cool thanks

 

not sure if you've solved this, but on the v8's there are two vacuum lines off the back of the upper intake manifold. one goes to the EGR valve, and on N/a m113 the other is usually capped off. i thnk its for testing, it will come in handy for me in case i ever need to get a intake manifold pressure reference in the future for mods

 

I read somewhere what it was, but forgot already. Must not have been too important at the time.

The diagram pmercury put up shows the vacuum system. Looks like number 160.

 

of course it is 160

 

These cars are about on par with the lunar rovers in complexity and engineering. There is so much to learn.

 

I REPEAT
You can not repair these cars in about 50% of the case
if you don't have the BASE of software tools and Sdconnect
the car is mega-ful of modules that are and can be programmed
pm me for directions

 

been working on this car for like 8 years, needed SDS software maybe 3 times tops...nobody wants your software man

 

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