Hello, I recently performed a DPF and EGR delete for a friend on his C5500 and after 800 miles his DPF light came on and the chime would go off every 2 minutes. No engine or transmission codes. It had a stored BCM code U1016 for loss of communication with ECM which I suspect was from the flash when I loaded the tune. This vehicle has the regen button on the dash to allow for stationary regen. I first cleared the code in the BCM and the light went off until re started then came back on. I pressed and held the DPF button while cycling the key on and the light went out and has so far stayed off. I suspect the light will come back on though. Has anyone had this problem before? Any help would be much appreciated, thanks.