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Old 09-11-2002, 07:00 PM
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Join Date: Aug 2002
Location: southern California
Posts: 12
vacuum lines diagram 420 sel

I looked through my mb cd but cannot find where and how many vacuum lines there are. I would like replace them (rough idle), if anyone can help I would be truely thankful
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Old 09-11-2002, 09:36 PM
420benz's Avatar
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Join Date: Jul 2001
Posts: 961
I would also like this info.
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Old 09-11-2002, 10:32 PM
RSH RSH is offline
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Join Date: Jul 2002
Posts: 106
Vacuum diagram

You did not mention what year your car is. I looked in my cd manual for the diagrams for a 1986 420SEL, start with main function group 14 intake manifold,exhaust manifold, In the sub function group go to section 475 checking exhaust gas recirculation (EGR) page 4 has a descent overall view, also sub function group 478 checking air injection page 1 gives a view limited to air injection, both will help in giving an idea of what to replace.
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Old 09-11-2002, 11:45 PM
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Join Date: Aug 2002
Location: southern California
Posts: 12
RSH, thank you for pointing me in the right direction. I followed your direction and found it, you are right it is a step in the right direction though I wish it was a little more straight foward.
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