Head gasket repair is complete and I'm still looking at a rough idle. I've done some reading on the site and it seems that vac lines are the problem, given the idle is in D or R and only when the engine is warm. Bought the breather hoses online just now, and I am going to swing by the dealership and get some of that vacuum line for the engine. My question:

On the m103, how much vacuum line should I buy, as it is sold by the meter, to replace all the existing vac lines in the engine compartment. Also, are there any other lines that could contribute to the problem elsewhere in the vehicle?

Thanks

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87 300E
202k on the clock