[Tewie]

When left overnight, my 2008 E70 sags in three corners - both rear and the driver side front corners. I do not suspect all 3 air bags failed at the same time, however I will perform a leak check for peace of mind. I want to know if anyone has had a problem with the Control Unit for the air suspension and if there is a way to test the unit. My objective is to avoid throwing miscellaneous parts at this since they are not very cheap. Thanks.