Our India office has received a shipment of Dell Latitude E7470 laptops. Our technician there is having issues imaging this laptop when attempting to use Acronis True Image (2015) as well in Win PE (Version 3 I believe for Windows 7 SP1). The issue in both cases is that the internal drive doesn't seem to be detected in both WinPE (using diskpart to list drives) or in Acronis (when selecting the destination disk).
For WinPE, I injected USB 3.0 drivers as well as Intel rapid drivers/ssd drivers from Dell's driver section for the laptop -- even injected from Dell's own driver packs which are typically used in MDT/SCCM environments and still no luck detecting the drive.
We have the same model in the U.S. and have not run into any of these issues.