In a perfect world the vacuum should be 29.99 HG but should be close to 25hg. It may be a wise bet to go ahead and rebuild the vacuum pump, just so you know what you have to start out with.

__________________
1981 300D 147k
1998 VW Jetta Tdi 320k
2001 Dodge Ram 2500 141k
1979 300D 234k (sold)
1984 300D "Astor" 262k(sold)
Mercedes How-To and Repair Pictorials
I love the smell of diesel smoke in my hair