Step 1:
Promise customer something non-existent
Step 2:
Complain big time that engineering is not co-operating in getting the order out in time. (without which you won't get your end of year sales performance bonus)
Step 3:
Comment about the product being sub standard. Rant about how engineering "great" products must be the philosophy. Blah blah blah...
Offer to provide your fucking support to make the product better despite not being responsible for it.Be the greater person.
Step 4:
Deliver the product. Pocket your bonus. Make jokes about how bad the product is and how you won't sell it again to protect the company brand reputation.
Step 5:
Rinse and repeat.

Fucking assholes.