If it simple is not stuck or hung up and you must replace it the part number for the hazard switch is 51026114AA. I think it includes the flasher relay, BUT is no longer available. Double check with Chrysler just to be sure. Mercedes 320 SLK switch is a bit different than ours, SO you will need to find a used one at a junk yard, eBay or someone parting out a car here on the forum. I sure hope that will fix the problem.