rear brake caliper on 2005 Mercedes-Benz CLK320

I changed the rear brake pads on my CLK 320. After replacing everything back I noticed that break fluid was leaking out of the caliper at the bottom. Took out screws from bottom and re tightened still leaking. What is causing caliper to leak?

Asked by for the 2005 Mercedes-Benz CLK320
you probably loosened the wrong bolts when you replaced the pads or you damaged something when you forced the pistons into the calipers. the car is unsafe to drive with brake fluid leak. if brake fluid has gotten in the
friction surface of the pads, they must be replaced also.