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1993 W140 with recent increase in sulfur smell
I have noticed the heavier sulfur smell at stops and after driving. I know this is typical output from the catalytic converter however the recent increase concerns me of pending problems or something clogged. Is there any "at home" or DIY options here such as gas additive,etc....to relieve any potential sticking valve/clog, etc. prior to taking to the shop?
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