Not sure if anyone can help? I have a 2015 peugeot Boxer loloader on air suspension at the rear. its been fine but has decided it will not lower on the button. it will go up and self level without a problem, it has been into Peugeot now twice and the last time they had it ie: this week they had it all week and still cannot get it to work. I know air suspension is not complicated so you would think finding the fault would be a straight forward process. Peugeot claim it is not a part fault ie: relay, switch etc but a wiring fault. Anyone had a similar problem? or has a sensible suggestion. the van is under warranty but I cannot afford to let Peugeot have it indefinitely as its a working removals van.