Mercedes Repair Questions? Ask a Mechanic for Answers ASAP
Hi, my name is***** are only two possibilities. Either the new caps are defective or the filler neck is distorted and grabbing the caps as you try to remove them. I'd try using a liberal amount of Vaseline on the cap and on the filler neck. Make sure that you get the Vaseline on the inside upper edge of the neck. If the caps still rotate the white part out of position when you remove them there has to be a slight distortion of the filler neck.
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