E-Class (W211) 2003-2009

Keyless go not working

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Old Dec 15, 2025 | 01:32 AM
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Keyless go not working

Hello everyone, This is my first post soo please correct any mistakes I make.

I have a w211 e320cdi (om648) 2004 and the keyless go isnt working. I have read a couple of old forums and I have replaced the key battery to no success. I have access to an autel and I can see that the car does recognise the key (being inside and outside the car) but on the live data when I press the push to start or lock and unlock buttons they dont register. I do have a code for the rear left antenna and the only key I have is (i think) the second key as its marked as no2. All the modules respond when I request their sw and hw numbers just the only think that is worrying me is the fact none of the buttons are being recognised by the live data. Can a single antenna cause all the buttons to just shut down even though the car recognises where the key is?
thank in advance for your help
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