Hi Jimbo
is your D110 a 300 Tdi or Td5? :roll:
If a Tdi I think the other plug goes in the timing case cover, I hope I got the terminology right (& everythings probably spelt wrong, sorry)
If it's a Td5, like I have had for thelast 5 Years from new..............and I've only just discovered (the other week, literaly) that I have two wading plugs for the bell housing. Doh ! :oops: which have been in there since new :shock:
I felt a right charlie for not realising all that time. :oops: :oops: :oops:
Anyway, I hope this helps you out a bit mate
kind regards, gary