Had a similar squeak. Bought some of the high-dollar grease that Vlad sells. Applied it to the rubber/metal interlocking parts, just below the latch, and to the pin/ball socket on the opposite side of the door. Not a problem since.
Before that, I tried lubricating these parts with other products, lubricating the entire weather striping and fiddling around with the door panels. Vlad's "Mercedes Silicone Paste", applied in these strategic areas was the ultimate fix.
Good luck,
-doubledub
Before that, I tried lubricating these parts with other products, lubricating the entire weather striping and fiddling around with the door panels. Vlad's "Mercedes Silicone Paste", applied in these strategic areas was the ultimate fix.
Good luck,
-doubledub