I ordered a set of new injectors for my early 99. This is how it went. I put glow plugs in it a couple weeks ago and looked every thing over while I had the covers off. I swear i saw AD on top of the injectors so thats what i ordered. The plan was to take out the inj. and exchange them when the new ones get here so I dont have to pay the core charge. So I take off the covers this morning and see AB on the inj. The question is will the AD's work and if they do work will the manufacturer take the AB cores?