SL-Class (R230) 2003 -- 2012: Discussion on the SL500, SL550, SL600

SL/R230: Keyless Go Issue

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Old Mar 22, 2021 | 02:35 PM
  #1  
matk's Avatar
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From: Northwich
R230 350SL
Keyless Go Issue

Hi All

Been back to the car for the first time in a few weeks. Keyless go not working now on both my keys, getting “key not recognised” message.

Keyless Go was working successfully last time I was at car.

Both keys currently work apart from that as in I can start the car successfully from both keys via the ignition socket.

Any ideas before I dive in?
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Old Mar 22, 2021 | 09:17 PM
  #2  
BenzNinja's Avatar
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Originally Posted by Plutoe
this is not a weekend driveway project the keyless go system is not simple and you need a very good scan tool to fine the fault-----but try it rip the dash apart and grab you mulitmeter
maybe a foxwell scanner ????
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Old Mar 24, 2021 | 12:05 PM
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2003 SL500, 1998 SL500
Put the car key by the transmission shifter. With a Foxwell NT510 locate the Keyless Go main menu follow this menu path: Active test -> Transmitter card locating and then press F1. Whether or not the test finds the key suggests the next troubleshooting step.
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Old Mar 24, 2021 | 12:12 PM
  #4  
matk's Avatar
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From: Northwich
R230 350SL
Originally Posted by BenzNinja
maybe a foxwell scanner ????
Oh absolutely lol! I’m not sure which module to look at though.
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Old Mar 24, 2021 | 12:13 PM
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matk's Avatar
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From: Northwich
R230 350SL
Originally Posted by Miami2021
Put the car key by the transmission shifter. With a Foxwell NT510 locate the Keyless Go main menu follow this menu path: Active test -> Transmitter card locating and then press F1. Whether or not the test finds the key suggests the next troubleshooting step.
Thank you, that’s a nice steer I’ll give that a go
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