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1996 mercedes e320 keyless troubles


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xtac1080 
Copper - Posts: 89
Copper spaceThis member has made a donation to the12volt.com. Click here for more info.spacespace
Joined: July 07, 2005
Location: Illinois, United States
Posted: December 15, 2007 at 7:00 PM / IP Logged  
I recently put a Valet 561R into a 1996 E320. This vehicle is equipped with the Benz factory alarm. I can get everything to work properly except the door locks. I actually have them working, just not properly. I found two wires (blue for disarm & brown for arm i believe) in the driver kick panel that show ground when the key is turned in the door (arm & disarm I presumed?). I hooked up the 561R's factory disarm/arm wires to these two wires and now the factory alarm arms & disarms and all doors/trunk lock & unlock EXCEPT when the vehicle is remote started. Upon remote start, all doors unlock and cannot be locked again by either factory remote fab or 561R remote. I searched high & low for these blue / YELLOW, blue/black wires that are posted for this vehicle to lock & unlock, but I couldn't find anything. Is it just me or is Mercedes a wiring mess? Factory wire ties not snipped, driver door sill a rats nest of loose wires. I have tried going to the interior lock/unlock switch on the dashboard, in which I found a WHITE/ green wire that locks and unlocks the doors while the car is running. When I press unlock, the WHITE/ green wire shows ground & 6ohms of resistance, but I cannot figure what it is doing when I press lock. Here is the diagram Mitchell On-Demand gives me for that switch:
1996 mercedes e320 keyless troubles - Last Post -- posted image.
It tap ground to this WHITE/ green wire and it just unlocks the doors. I cannot figure out how to lock...GRRRRRR!!!! If anyone has any clue what to do here, please let me know!! You feedback is greatly appreciated! One more thing, the customer complained that his factory alarm started going off while he was driving! wth?!?! I don't know how this could have happened nor have I been able to reproduce this phenomenon.....I HATE BENZ!!!
xtac1080 
Copper - Posts: 89
Copper spaceThis member has made a donation to the12volt.com. Click here for more info.spacespace
Joined: July 07, 2005
Location: Illinois, United States
Posted: December 16, 2007 at 12:17 AM / IP Logged  
NOTE: When measuring for resistance, I hooked the multimeter up to the brown wire and the WHITE/ green and applied the switch to the lock position then the unlock to get my readings.. this is how to measure, correct? I only get a reading on unlock of 6ohms..and when ground is applied to this circuit (whether through 60hms of resistance or not) all I can get it to do is unlock. I NEED LOCK!!!
howie ll 
Pot Metal - Posts: 16,466
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Joined: January 09, 2007
Location: United Kingdom
Posted: December 16, 2007 at 4:10 AM / IP Logged  
It's 200 ohms through the white green, I think there might be a keysense wire to disable, you also got things like acc 2 ign 3 coming off the ignition switch. On a standard alarm I go to the blue and black and extend the black time for total close. In UK dealer installed alarm went under the passenger floor panel. 
xtac1080 
Copper - Posts: 89
Copper spaceThis member has made a donation to the12volt.com. Click here for more info.spacespace
Joined: July 07, 2005
Location: Illinois, United States
Posted: December 16, 2007 at 2:33 PM / IP Logged  
Now is that 200 ohms to LOCK? That would be most amazing!
howie ll 
Pot Metal - Posts: 16,466
Pot Metal spacespace
Joined: January 09, 2007
Location: United Kingdom
Posted: December 16, 2007 at 3:26 PM / IP Logged  
Can't remember which way round!!  1996 mercedes e320 keyless troubles - Last Post -- posted image. Try both ways, it won't hurt if you've got it wrong. N.B. I pop out the door contact and disconnect 1 terminal, remove key from ignition and throw  door lock latch otherwise it won't  test properly.

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