Key fob on E class saloon 2010 not working

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Daiprich

New Member
Joined
Aug 25, 2020
Messages
1
Location
Salisbury
Car
E350
Hi there. Help!
Key fob suddenly failed. Won't open locks, and won't start engine.
The spare fob works fine.
So I changed the battery, and can see the red indicator light when operated.
And I can see the IR transmission with my phone camera.
I tried various 'synch' instructions found on the web (hold down lock; press unlock 5 times, etc ) to no avail.
Any tips, please?
 

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