Tell him to shove it where the sun don't shine. If he cares that much have him pay the MB shop do it themselves and if anything breaks upon removal, he has to pay for it. Have at least $500 in hand when it goes to the shop.

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Only diesels in this driveway.
2005 E320 CDI 243k Black/Black
2008 Chevy 3500HD Duramax 340k
2004 Chevy 2500HD Duramax 220k