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Discussion Starter #1 (Edited)
My 2008 E350 with Keyless Go has an unlocking delay when opening the trunk or any door after being locked for an hour or more. Batteries have been replaced in both key fobs and new car battery (no auxiliary batter). Also, if I immediately lock and unlock the doors or trunk, then no issue. It almost appears as if the security system goes into sleep mode. Any troubleshooting suggestions appreciated. Thanks.
 

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2008 E350 4Matic, 2011 E350 4matic
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Where's the key when there's this delay? If it's in your pocket behind the cell phone, the signal is probably being blocked by the cell phone.
 

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Discussion Starter #3 (Edited)
Hello CetiAlpha5. The key is in my pocket (as always over past years) but not near a cell phone. Had concerns over signal strength and both key fobs perform same, even when held in my hand.
 

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Well the distance also sometimes seem to matter. When it's in my pocket and I'm at an arm's length from the car, it doesn't detect the fob, but if I get really close to the car, it sees it.
 
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