I did a lot of research into Rommel for both my 'Afrika Korps' and recent 'Battle of France' dioramas and, for France in-particular, I was keen to have the man with the plan in the uniform of the Panzertruppen (given his command of an armoured formation but then also noting that he was an infantry officer by trade) - I could find no period pics (out of the many I scoured) of him in such a uniform to back the idea.
Despite that he may not have worn such a uniform - he does cut a nice figure in one and you're interpretation comes up very nicely. Cheers, Steve