Mundoracer, Can you post an update on your Vacuum boost mod? I am curious if you still notice a difference with this on vs without (normal)

This is a pretty simple non invasive mod, I will definitely give it a go myself, if you have any luck.
98 E300TD

Agreed! Please post an update.

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Ed
-1984 Mercedes 190D 2.2 5-speed gray market(bought@30,000 miles) (Sold back to original owner@170,000 miles)
-1999 Mercedes E300DT (245,000 miles)
-1999 Mercedes S500 Grand Edition (80,000 miles)