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R230 SL55 central locking radio receiver amplifier

Discussion in 'Electrics, Vacuum, Ignition and ECU' started by zedmeister, Jul 24, 2017.

  1. zedmeister

    zedmeister Senior Member

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    Your Mercedes:
    SL R107/1985/2.8, CLK C208/2002/3.2, E Class W213/2017/220d, SL R230/2003/5.4K
    Hi
    I've just got myself a SL55. One small problem is that the key only locks and unlocks the car when it is close to the handles using IR. MBS Southampton have said that the key is transmitting radio but the receiver amplifier on the car needs changing. Any idea where that is and the part number? Thanks
     
  2. LostKiwi

    LostKiwi Senior Member

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    '93 500SL-32, '01 W210 Estate E240, 02 R230 SL500 (Malcolm Spec), 04 Smart Roadster Coupe
    Are both keys doing the same?
     
  3. OP
    zedmeister

    zedmeister Senior Member

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    Your Mercedes:
    SL R107/1985/2.8, CLK C208/2002/3.2, E Class W213/2017/220d, SL R230/2003/5.4K
    Unfortunately the car has come with one key only.
     
  4. David Arnott

    David Arnott Senior Member

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    See attached, is is either left or right antenna.
    Part no. 230 820 09 89 or 230 820 10 89, check with Merc. parts for your car.
     

    Attached Files:

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  5. OP
    zedmeister

    zedmeister Senior Member

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    SL R107/1985/2.8, CLK C208/2002/3.2, E Class W213/2017/220d, SL R230/2003/5.4K
    Thanks for that - exactly what I need. So do the left and right do the same thing? What are the others for? Are they accessible from the bonnet or under the wings?
     
  6. crippo2

    crippo2 Senior Member

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    Your Mercedes:
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    I think you will find it is the right hand pre-amp, the one on the drivers side. To get to it you will have to remove the dashboard.
    A long, but not unduly difficult job. you might then find it is not the pre-amp at all, possibly the antenna connections. To check this remove the A pillar interion cover & the antenna to pre-amp connections will be revealed. Alternatively wiring from pre-amp to other bits which control the lock/unlock function.

    Get WIS - it will make life much easier.
     
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  7. C A R S E

    C A R S E Senior Member

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    Your Mercedes:
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    Hi, did you get to the bottom of your locking issue?

    My car (2003 SL55) has the same issue I can only lock the car if I point the key fob directly on the IR sensor on the handle. Also my keyless has stopped working at the same time.
     
  8. OP
    zedmeister

    zedmeister Senior Member

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    SL R107/1985/2.8, CLK C208/2002/3.2, E Class W213/2017/220d, SL R230/2003/5.4K
    I had the car on star and was told that there is no communication to the keyless go ecu. So I have bought a replacement ecu but not had time to fit it yet. Will update when I have tried that. Was told that any such problem on the canbus can cause units to shut down like the central locking receiver so best to first sort out all the issues before moving onto the next!
     
  9. OP
    zedmeister

    zedmeister Senior Member

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    Your Mercedes:
    SL R107/1985/2.8, CLK C208/2002/3.2, E Class W213/2017/220d, SL R230/2003/5.4K
    I also got a copy of wis but not having much luck using it to find the exact location of the ecu. I know it's in the left side of the boot i think.
     
  10. C A R S E

    C A R S E Senior Member

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    Your Mercedes:
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    Hi, did you get to the bottom of your R230 locking issue?
     
  11. OP
    zedmeister

    zedmeister Senior Member

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    Tbh, no, I've not had the time. Have you sorted yours yet? I may have an update when it goes in for service in a couple of weeks as I will ask them to fit the ecu as well.
     
  12. C A R S E

    C A R S E Senior Member

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    Hi, Did you manage to fix your locking yet?
     
  13. LostKiwi

    LostKiwi Senior Member

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    This is like groundhog day! :)
     
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  14. John Laidlaw

    John Laidlaw Senior Member

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    This is like Groundhog Day :)
     
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  15. OP
    zedmeister

    zedmeister Senior Member

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    Well, I've had the keyless ecu changed and this did not fix the issue. In fact, I plugged it into my diagnostic tool and the keyless ecu is still not communicating.

    New problem which needs to be dealt with first: PSE pump has failed!

    I wonder why the keyless ecu is not responding on star and on my diagnostic tool, even though it's been replaced? Any ideas? Could it be the SAM even though everything else responds? I want to eliminate everything else before deciding to take the dash out!
     
  16. C A R S E

    C A R S E Senior Member

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    Sounds very similar to my Symtoms:
    • Keyless Entry/Start (KG) NOT Working - 'Key Not Recognised' appears on dashboard
    • Remote Locking (RF) NOT Working - Cannot Lock/Unlock car at any distance
    • Infrared Locking (IR) is Working, I am able to Lock/Unlock the car if I point the key(s) directly at the IR sensor(s) on the door handles (Where Boot, Doors and Petrol Cap all lock/unlock), which means the PSE pump is working.
    So far I have:
    1. Replaced main battery in boot
    2. Charged Battery under bonnet (Was more or less already fully charged)
    3. Replaced batteries in both key fobs
    4. Checked all fuses (With 12v light tester)
    5. Tried a couple of steps to sync the keys (Not sure if any of them were correct)
    6. Connected to STAR, where there was no errors shown, however the '750 CGW. N93 (Central Gateway, Control unit)' was shown as 'NOT PRESENT' ??? (Not sure if this is normal or not)
    7. Disconnected both batteries (overnight) in the hope a shutdown of the system resolved it
    8. Unplugged all SAN connectors (Located behind drivers seat) one by one, after disconnecting both batteries.
    9. Tested all other electrics in the car and everything else works including the alarm
    10. One thing I have noticed is when the roof is down, the boot/roof separator button doesn't work, this cant be linked?

    The car is mostly kept garaged, so can't be caused by a water leek (Boot and inside car are bone dry).

    My first thought was what links the KG and RF systems, are they reliant on each other if so what components do they share? I believe the antennas are shared but dont fancy taking the dash out either :(
     
  17. LostKiwi

    LostKiwi Senior Member

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    How many keys do you have?
    If 2 do both keys behave the same way?
     
  18. C A R S E

    C A R S E Senior Member

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    I have two keys, both have always worked the remote locking (RF) but only one has ever worked keyless (KG).

    When the keyless stopped working the remote Locking also stopped working with both the keys. I have also replaced the batteries in both key fobs.
     
  19. LostKiwi

    LostKiwi Senior Member

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    '93 500SL-32, '01 W210 Estate E240, 02 R230 SL500 (Malcolm Spec), 04 Smart Roadster Coupe
    Not sure if it's the same on later ones but on earlier ones the KG is a separate adjunct to the RF. From memory the KG sits on a track associated to the RF code. Sometimes the linkage can get lost and requires resyncing via STAR. It's also not unknown for RF coils to come loose from the PCB in the key. Really the only way to test these is via STAR.
     
  20. C A R S E

    C A R S E Senior Member

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    Your Mercedes:
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    Someone kindly connected the car to their STAR, where there was no obvious errors that he noticed, however the '750 CGW. N93 (Central Gateway, Control unit)' was shown as 'NOT PRESENT'

    Do you know if this is normal?

    At the time he only checked for errors and never knew how to run any of the STARs troublshooting.
     

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