Kent explains why these lock assemblies can be so troublesome to install. Many owners have learned the hard way only to have the assembly seize up and not even be able to remove the key. Then it is on to cutting and drilling. So much grief for such an important part. He ends the video explaining what he believes to be the best solution for all involved. Applies to 1990 to 1991 126 chassis sedans and SEC couples, all 1990 to 1995 124 chassis coupes and sedans, and 1990 To 1993 201 190E.