unblocking

Hi I have just got a 2008 CLK 20CDI. The last owner had the 2 original keys but informed me that one of them was previously lost and had been reported to Mercedes who blocked it. She later found the key but never got unlocked. Is there a way to unblock this key and if not how much are MB...

One side of my headlamp washer isnt working, I suspenct either its blocked or the pipeing has been dislodged. Without removing the wheel, wheelarch liner, bumper is there anyway to extend it without it popping back into the car after being pressed?