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      10-07-2016, 01:15 PM   #18
SpikeMilligan
35is driver
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Drives: 2012 S-drive 35is
Join Date: May 2014
Location: U.S. East Coast

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Quote:
Originally Posted by kosd View Post
I believe the noise you hear when unlocking from overnight is the Hp fuel pump priming and is normal for our vehicles.
I think that's actually the low-pressure (lp) fuel pump inside the gas tank. The sound I hear on unlocking seems to be coming from behind the seats. The high-pressure (hp) pump is under the hood, attached to the engine.
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