tranny dipstick should be at rear of the engin passenger side with red cap. check on level ground engine running. No need to check often if you are not getting any red fluid drips.
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)