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#1
08-25-2010, 03:44 AM
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DIY Keyless Entry - W126 and W124
Wanted to put a reference over here for those folks that may not make it over to the diesel forum where this was originally posted:
http://www.peachparts.com/shopforum/showthread.php?p=2531985#post2531985
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Treiberg's Collection: 1981 240D, 1985 300SD, 1992 300E, 1997 E300D, 2005 C230K 
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#2
08-25-2010, 01:27 PM
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I used a 'rec43t' keyless kit from some company called 'omega research' on my W201. It has 4 wires (lock, unlock, power, ground) and 2 remote controls. It cost $25 and works great. I wired it through the trunk lock. W124 and W126 would use the same setup.
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CENSORED due to not family friendly words 
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#3
08-25-2010, 01:59 PM
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Its important to note that on first generation w126's you'll need to install a door lock actuator on the driver side door as there is no vacuum supply. I had to do this on my one 300SD.
The 201 has a Directed Electronics unit, works well, its tucked under the the back seat.
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Cruise Control not working? Send me PM or email (jamesdean59@gmail.com). I might be able to help out. Check here for compatibility, diagnostics, and availability! (4/11/2020: Hi Everyone! I am still taking orders and replying to emails/PMs/etc, I appreciate your patience in these crazy times. Stay safe and healthy!) 82 300SD 145k 89 420SEL 210k 89 560SEL 118k 90 300SE 262k RIP 5/25/2010 90 560SEL 154k 91 300D 2.5 Turbo. 241k 93 190E 3.0 235k 93 300E 195k
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#4
08-25-2010, 07:57 PM
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Just be careful an aftermarket unit that didnt have 3 second hold for the locks (usually using bosch relays to accomplish) can burn up the central locking wiring along with the door sensor/trunk lock wires. I have replaced about 20 wires from a unit that looked wired correctly with bosch relays and it still did things tha may never really be ever fixed. And yes all lines had fuses, but it looks like a slow burn if you know what I mean.
Once I removed and re-ran wires and resoldered I have been trouble free for the most part.
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#5
08-28-2010, 05:42 PM
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tjts1,
I have the REC-43T and I have been trying to figure out how to wire it up to my '91 300CE (W124). I tried to connect it to the trunk lock actuator and I can't get it to work. I have 3 wires from the vacuum pump (under the back seat) to the trunk - red (12v all the time), yellow (12v when unlocked), and a brown wire (ground). I don't have the blue or the green wire (from the REC-43T) connected anywhere - and I'm sure this is part of my problem. Any suggestions? ryan
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RG Newell 1984 300D 1972 250 1986 560SL 1991 300CE
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