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clk500 w/ 55kmi has sludge deposit - what to do, if anything?
Just got the car. What should I do? Simply replace the oil with Mobil 1 synthetic every 5000 miles or so, or should I first use some engine flush (which one?) and replace oil every 5kmi?
Is there another synthetic oil that is more detergent?
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2008 S550
2010 GLK350
1997 E420 (retired)
2005 CLK500 (retired)
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