Obviously your crumble zones crumpled properly and absorbed most of the energy of impact. The impact energy needs to be sensed by the SRS control module mounted on the tranny hump before the bag(s) deploy.
While I'm thinking about it, check to see if your seat belts freely retract now after the impact. If not, the module sensed enough of the impact to deploy the ETR (seat belt retractors). If they don't freely retract when you pull them out, the seat belt units will have to be replaced.
'73 280SEL 4.5 (9/72)- RIP
Only 8,173 units built from 5/71 thru 11/72
'02 CLK320 Cabriolet - wifey's mid-life crisis
2012 VW Jetta Sportwagon TDI...at least its a diesel
Non illegitemae carborundum.