From Dieselbenz.info Wiki
|Part Number(s):||0440017998 and gasket|
|Best Place to buy:||Standard Places|
|Cost to Have it done in a shop:||$|
|How long it may take:||1 hours|
|Special tools needed:|
There it is.
It is literally as simple and disconnecting it, unscrewing it, and putting it back.
Be sure to Bleed the Fuel lines after you are done!