Larry on the slide
As said, my W124030 an '87 W124030 is thirteen years young. Twice a year I've cleaned and lubed the slides. When it's warm you do the same. Open a little and then close, open and close until it opens and closes easily. I use a spray and white litho-grease. Happy Trails Beep Beep from Houston.
Here's shining in her Beautiful EYES.