A motor vehicle is essentially a motorised metal box normally with a wheels at each corner in which some the the wheel provide traction to propel the metal box in a certain direction. If this functionality of propulsion is unavailable then the you essentially have a static metal box, which is not much use except for sitting in. Best to concentrate on ensuring that the principle function of motorised propulsion is kept intact.

Many folks who find their metal box is now static, usually give up to easily to keep their motor vehicle going forward.

A lot can be learnt from these fellows.

http://www.dailymotion.com/video/xgalod_top-gear-bolivia-special-part-1-of-8_auto

Even the worst car in the world won out in the end.