[Uncleherb]

My Smart has been having periodic problems going into reverse. sometimes it CLICKS/BANGS when trying to reverse. This time it did it, my check engine light came on. Ran the code with my FIXD app and came up with P073E code. I believe it is the shift modulator but not sure. Mercedes says the part is close to $1000. Anyone have this problem? Or know where to find the part?

Thanks!!!