Front Seat Sliding Track Removal
 

I found out the long flex shaft of the motor is stuck to the worm gear. I need to remove the track from the assembly to check the worm gear condition. Anyone knows how to this? The seat is already out. This is for the passenger seat of a 2006 ML500.
I've tried to pull the shaft out by pulling/flexing/twisting, it just doesn't want to budge!
https://cimg1.ibsrv.net/gimg/mercede...4467b5cfd4.jpg