Part x351 (41850) - Body, Racers Driver

[Chris Böhnke]

I think what Rene means is something like this:
   

A single line should only have 2 vertices on it. You probably have to puzzle a bit to get this arranged correctly with the connecting geometry, but it should be possible. There might be a few exception an additional vertex is  unavoidable, but those shown can be merged for example.

Also you should rebuild the neck area using a primitive (blue) and then add new triangles (red):
   

(Please note there are still a few unneccessary vertices in this image that should be merged)

Hope this helps a bit.