W140 Coupe Window Synchronize
 

One of my friends has a 95 s500 coupe and some weird sthing happends with the power windows on one side,pass. side: If you slam the door closed(without the power assist to help) windows will not go up the last half inch,they do go down a little when you open the door,however they will not come back ,only if you use the power assist,otherwise is like they do not recognize that the door is closed.Drivers side is fine.We tried to synchronize them,using the advise on the forum,after first try,they will not go down anymore when you open the door,at all,we repeted the procedure and it came back the way it was.Any suggestions?