Not only it is totally hard to say, it is also a tough nut if you haven't got any anti-tank units and/or artillery. The blitz in itself is nasty. A Panzer IV tank and 3 Kübelwagens come at your lines.
How Do I Deal With It?
Destroy the tank if you have some anti-tank units, for example a Sherman, and deal with the kubels later. Gunners and grenades do a good job at killing the Kübelwagen crews and artillery can also kill this blitz rather easily.