The glow plug lights have come on and gone off since I got the car.  After a few of those, the check engine light came on and has been on ever since.  Took it to three dealerships and got 3 different answers & resolutions.   None worked, of course and now the DPF light has come on.  It was suggested that I get on the hwy and drive in 4th gear, at or above 2500 rpms for at least 20 mins.  That didn't work because there are other dashboard lights on.   The check engine light, airbag light (not sure why) and the tpms light.  Recently put tires on and haven't had the energy to deal with it.  I have an OBDII scanner and don't see anything for the airbag or tpms to clear them, so I cannot get the regeneration start!  

HELP!