Keyless start intermittent fail
03-01-2019, 06:27 PM
#1
Junior Member
Thread Starter
Keyless start intermittent fail
Probably once a week, first thing in the morning, when attempting to start the e350, I have the key fob in my pocket and when i push the start button, the display reads "key not available". So I pull the start button out , instert the fob and it starts. After that no more problem using the fob in remote. New battery in fob. Any ideas??
03-01-2019, 10:00 PM
#3
Senior Member
Happened frequently on our 2015 E350 4matic. Wife refused to drive the car. After dozens of attempts to fix, we decided to sell the car.
03-02-2019, 01:35 PM
#4
Senior Member
So you push the start button, a signal is sent by the car to see if the key fob is near, the fob responds, the car receives the message sent by the FOB, and starts the car. Any part of that transaction could fail. I have no idea how to determine which part of the transaction fails.
Last edited by Sunnyslope48; 03-02-2019 at 09:44 PM.
03-02-2019, 05:31 PM
#5
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Join Date: Oct 2005
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2014 E550-sold 😩
I had key recognition issues a few times when my key was in the same pocket as my iPhone. I don’t let that happen anymore and the recognition problem is completely gone.
03-10-2019, 02:27 PM
#6
Junior Member
Thread Starter
SOLUTION to "key fob not found"
OK, so occasionally the dash says "key fob not found". The reason? I carry my fob in my pocket all day and sometimes it one of its buttons get pressed then the car can't "find" the fob. I found that simply pulling the fob out of my pocket and pressing the "unlock" button will allow the key to be recognized. 
