As said. Silicone lube on the seals. Also this MIGHT be a sign of a dying battery, I found with mine that the voltage drop caused by the motor was enough for the doors canbus module to lose the plot. So if your main battery is more than 8 years old then this might be a factor.
Unplugging the door module connectors resets this.
It might also be the switch itself or the connection between switch and module.
I have a spare door module in my garage if it helps?
Where do I get auto switch from and will it work with a 2001 car ?
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