It would appear that the dog tag reads this way:
Leichte Kolonne der I Abteilung der Artillerie-Regiment 182
Blood group 0.
Image courtesy of http://www.passionmilitaria.com/t45547-plaque-d-identitee
WW2 German ID tags are difficult to read. For a forum discussion on WW2 German ID tags, visit WW2 http://www.wehrmacht-awards.com/forums/showthread.php?t=517269