I've read on the internet, in a couple of maintenance books and asked a few buddy mechanics and they all seem to point to the fact that a healthy diesel engine should not produce black smoke and that the common reason why this happens is because of too much fuel to not enough oxygen leading to incomplete combustion. (mechanics.stackexchange.com)
This 5000 QV is now offered by the selling dealer with its its original owner's manual and warranty / maintenance book in a leather folio, factory tool roll and jack, Lamborghini leather work gloves, an unused spare tire assembly, a copy of the 1991 title, clean Carfax and AutoCheck reports, and a clean Texas title. (bringatrailer.com)
Our home inspections also include a complimentary maintenance book, RecallChek on all major appliances and «We'll buy your home Guarantee» backed by InterNACHI (topchoice-homeinspections.com)