Here's a quick sketch I did for a friend in need of inspiration. Nothing too fancy, just a good 'ole 'beater mech.
He is currently modeling it for a vehicle competition on the Eat3d forums. Check out his progress here: http://eat3d.com/forum/contests-and-challenges/high-poly-vehicle-raul
And a WIP of the MK5 (because i know that's what you're really here to see).