1989 300E

Would anyone be able to shed any light on the process of disassembling the power seat controls on the door to acess the contacts. I have reviewed other post with similar issues pertaining to the passenger seat not being able to incline. All other functions on the seat are working.

Would this step be adviseable for should I inspect the motor on the back of the seat?

Any help would be appreciated as I am a unexperienced DIY.

Many thanks in advance.