Because Damlier-Benz did two things for the Chrysler brands that haddened been done before. The brought up to date styling and better engineering to all Chrysler brands. They just couldn't deal with the UAW anymore. As they said when they divested of Chrysler that the quality of workers in Germany compared to Detroit were oceans apart!
You don't think unions are live and well in Europe? Think again!!
Two totally different markets is why this did not work.
The only true statement is that Chrysler gained form their technolgy