Since this weekend I have been recording my (R230) SL500 from 10/2001, after only 78.000Km, a scraping noise, with slow travel and idle at traffic lights. Today I had the vehicle on stage at my MB – Werkstatt Bonn – Mehlem to look for. The double pipe exhaust system, runs parallel under the vehicle floor, sunk in the cardan shaft tunnel, left / right separated. A knock against the right, small coat resulted from the catalyst, which probably In the meantime, inside the ceramic element has been removed from its attachment, which explains the shearing from the vehicle underfloor. The workshop estimated for the replacement of the right catalyst with wage approx. 1,200.- Euro. Is there possibly a cheaper solution to fix the loose ceramic part in the small pot again? Is there possibly a workshop in the Rhineland that specializes in repairing this defect?