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Old 01-30-2019, 07:54 PM
97 SL320 97 SL320 is offline
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Join Date: Jan 2012
Posts: 7,515
If you are using an amp clamp for testing, just clamp the large alternator wire.

Still getting a drain, sometimes only about .4amps, sometimes as much as 2.5.
From reading other posts, CAN bus systems will stay awake for a few minutes then go into sleep mode. This is probably where you are getting the 2.5A draw. The 0.4 A draw is probably your main issue.
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