The min and max marks on the brake fluid reservior are there because as pads wear - the amount of fluid in the reservoir decreases (as the pistons extend further due to thinner pads).

I'm not sure fi it would help - but getting your fluid level to the "max" mark after installing new pads should be done.

If you've had your brakes bled - it's strange that the shop would overfill the reservoir.

Perhaps you've got a stuck piston somewhere?

Sorry I'm not much help.

Troy
1995 E420