Thanks for the input Smokey
Those are great ideas and definitely the best looking ,but more expensive
..I know ECS ,for Audi ,do a boost gauge for the vent pod for nearly $200!
8e0998002 - ECS Vent Pod Boost Gauge Kit - ES#8017
I fitted an analogue boost gauge with no brand name ($30) and the rest is labour
.Think it suits the x5s somewhat outdated interior