It's likely the struts. In the cold on small bumps the valves inside some struts can cause a soft knocking or clunking noise until the shock oil gets up to operating temperature. Some types of adaptive shocks are more prone to this noise. My 228i does it for a couple minutes when it's really cold too.
There's nothing the dealer can do about it, don't bother taking it in.
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2015 M3, 2005 330i ZHP, 2015 228i 6MT Track Handling Pack, 2007 M Coupe (Sold)
Last edited by Racer20; 03-09-2015 at 08:47 AM..
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