Well, it looks pretty darned good! But CSO, get in there and paint those wheel interiors!!!--you can plainly see that bare gray plastic in between your road wheels. 
That won't do. It's quite noticeable! They could be painted in either primer red or base color, or some people would paint them in a "lowlighting" color, like dark brown, like a shadow.
Also, good for you for at least attempting the figure. He came out fine. He'll give you a nice sense of scale. And the track sag looks spot-on! 
Have to say, the brush painting really worked out quite well with the weathering! The overall finish looks pretty good! A few things though, besides the wheels--the fire extinguishers are not red; they're the same base color as the tank, and German antennas were rod-straight--not "whippy" like US antennas. And the "rope" should be steel--that's a cable, not rope. Of course, it's up to you what you want to change, but these are things that should be pointed out if you want to start fine-tuning things. 
Don't worry about all the wheels--Dragon regularly has a bunch of extra parts in the box that you never use. Read your parts sprues more accurately to see what parts you really need. In some of these kits, you'll waste a lot of glue and time putting stuff together that you don't need for that particular kit. his is because Dragon uses the same sprues for a lot of their "variant" kits; late type, early type, different "aufsrung", etc. Leave those parts on the sprues, and keep 'em for later projects---you may need different sprockets, for instance, in a later build, or may want to use them in a diorama setting. 