2005 MB S430 Problems
Problems: changed the command system three times and the current one is showing a lot of pixels missing. Sensor for the interior temp went bad. Changed instrument cluster three times and the current one stopped showing clock/gear select and outside temp combined with wrong speedometer. Changed three times the AC fan regulator. replaced the right door module that controlled window and seat functions.
The locking is likely a leak in the PSE system that's caused a fuse to blow or the pump to shut down in self-protection. Be thankful for that...the pump is nearly $800...so you want it to shut itself off while someone properly troubleshoots the leak.
Pixel failure? I would replace the unit, too, but you clearly are swapping in used parts over and over and expecting a different result.










