COURT TRIAL - BENZ

MY SHOP THAT I PAID ALMOST $3000 TO FIX MAJOR LEAKS AND OTHER SMALL THINGS FAILED TO FIX THE LEAKS. THEY ARE EVEN WORSE. MUCH, MUCH WORSE. THE SAME SHOP HAD DONE EXTRA WORK AND CHARGED ME WITHOUT GETTING AN O.K FROM ME. WHEN I REFUSED TO PAY FOR EXTRA THINGS THAT I DID NOT NEED OR WANT THE SHOP SAID THAT HE WOULD TAKE PARTS OFF MY CAR TO MAKE UP FOR THE MONEY THAT I DIDN'T PAY (HE WAS VERY MAD) NOW THAT THE LEAKS ARE DESTROYING MY DRIVEWAY I NEED THEM TO GET FIXED. I WENT BACK TO THE SHOP AND THE MANEGER SAID THAT THEY WOULD NOT WORK ON THE CAR. THE NEXT TIME I WENT AND THE OWNER OF THE SHOP WAS THERE HE KEPT SAYING TO LEAVE THE CAR BUT I CAN NOT TRUST HIM WITH MY BENZ AT ALL. FOR A FACT, HE WILL TAKE PARTS FROM MY CAR THAT ARE NOT RELATED TO THE LEAKING PROBLEM AND CHANGE THEM WITH GARBAGE LIKE HE DID WITH MY BATTERY AND ALTERNATER AND THEN HE WILL SAY THAT HE HAD NOTHING TO DO WITH IT. I TOOK IT TO ANOTHER SHOP AND THEY PUT IT ON A LIFT AND I SAW THAT EVERYTHING THAT WAS SUPPOSED TO BE FIXED WASN'T. THE SAME SHOP TOLD ME THAT MORE THAN A DOZEN PEOPLE HAD WENT TO THAT RIP OFF SHOP AND HAD GOTTEN ALOT OF $ STOLEN. I WANT TO TAKE THIS GUY TO COURT AND GET MY MONEY BACK.
DO I FIX IT AND GO TO COURT WITH THE PAPER WORK AND GET MY MONEY BACK OR WILL HE JUST CLOSE DOWN AND OPEN UP AS ANOTHER NAME.
DO I GO TO COURT BEFORE I FIX IT ???
CAN YOU PLEASE HELP ME BECAUSE I OWN ONE OF THE BEST MERCEDES IN THE WORLD AND I CAN'T EVEN START IT (HE PUT A BAD ALTERNATER AND BATTERY IN MY 420 SEL) WHAT ARE MY OPTIONS?