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You don't have to remove the hazard switch to clean it. I just did mine on a 2005 SL350 I bought a week ago. All you need is some paste wax, your finger and a clean cloth. Use your finger to put a very small amount of wax on the centre of the switch. Use your fingernail to mix the wax with the sticky stuff. When it is well mixed, use the cloth to wipe it off. Do this over and over again until the switch is clean. It took me about 5 minutes. Be careful not to put too much wax on. Don't focus too much on the painted hazard symbol. The wax will eventually take it off if you try hard enough. Be careful not to spread the wax into the crack between the button and the housing. No need to buy a new switch either.
You don't have to remove the hazard switch to clean it. I just did mine on a 2005 SL350 I bought a week ago. All you need is some paste wax, your finger and a clean cloth. Use your finger to put a very small amount of wax on the centre of the switch. Use your fingernail to mix the wax with the sticky stuff. When it is well mixed, use the cloth to wipe it off. Do this over and over again until the switch is clean. It took me about 5 minutes. Be careful not to put too much wax on. Don't focus too much on the painted hazard symbol. The wax will eventually take it off if you try hard enough. Be careful not to spread the wax into the crack between the button and the housing. No need to buy a new switch either.
I just bought a 2007 SL550. That hazard/lock/unlock switch looked terrible. Found a brand new replacement (Hazard Switch - Mercedes-Benz Part No. 230-821-34-51-9116) here: https://www.autohauspartsdelivered.c...BoCWmUQAvD_BwE
Perfect match. Reluctant to do it myself, I found a video here:
It's pretty straightforward and you only have to remove the top part (where the clock is) and the center piece with vents/lock switch. It's a pain, for sure, but I know very little about cars and did this. Hardest part was getting the two screws out but it's manageable when you find the right, small star-shaped screwdriver head.
Take care and go slow. There's not much to do except getting the two pieces unsnapped. I used a plastic putty scraper. Replacing the switch itself was probably 2 minutes of the hour job messing around trying to get everything off carefully.