My ML500 is only 3 weeks old and I have noticed that the handle has started discolored. I brought it back to the dealer and they told me that this is a known problem. They suggested me to use some silicone solution on the handle from time to time (similar concept as you treat the tires). Anyone has similar experience?<br> <br> Also, since my car is black, I need suggestion on how to remove swirl marks. <br> <br> Thanks.