$125 for the coil. The coil is to the left of the engine, located just behind the PS pump and attached to the chassis. Matt these stumbles can be caused by fuel delivery aswell. In fact, I have a big thread where I asked if it could be my coil, then went down the fuel direction only to comeback and replace the coil. It is a very easy diy so i would definately check it.
m

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Martin Ingram
Colorado Springs
2005 320 CDI
2006.5 VW Jetta TDI
1991 560SEL (179000 Sold)
1972 280SEL 4.5 ('The Lead Sled' 320000 miles when sold.)
1972 220D (225000 when sold)