Looks like it's the symbol for the 19 Inf.Div.\19 Pz.Div. Below that is the WH denoting a civilian registered vehicle in the service of the Wehrmacht and below that is the tactical sign for motorised artillery, the I relating to the I abteilung.
Collecting German award documents, other paperwork and photos relating to Norway and Finland.
I am pretty sure that Simon is correct; there are a lot of units that used a Wolfsangel as their unit marking, this particular variant was used by 19th.
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