remote start on mercedes e320; spoof ir?

Printed From: the12volt.com
Forum Name: Car Security and Convenience
Forum Discription: Car Alarms, Keyless Entries, Remote Starters, Immobilizer Bypasses, Sensors, Door Locks, Window Modules, Heated Mirrors, Heated Seats, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=134708
Printed Date: May 17, 2025 at 1:22 AM

Topic: remote start on mercedes e320; spoof ir?

Posted By: joekitch
Subject: remote start on mercedes e320; spoof ir?
Date Posted: August 11, 2013 at 10:31 PM

i am aware that mercedes with the infrared smartkey starter are basically impossible to set up remote starts on, simply because the car needs to receive that special infrared signal to unlock the car before the engine can be started, IN ADDITION to the radio transponder signal.

however, what if you just straight up spoofed the IR signal?
pop open the ir housing of the door, code a little arduino to just record signals from the control board attached to the ir detecting diode.
then code said arduino to replay that recorded signal whenever a certain line in is energized

other than that it works like any old key-in-the-dash starter, except with one extra wire going to this ardunio that energizes when it gets the remote start signal

could this work? posted_image

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impossible is nothing; use a breakout board.

Replies:

Posted By: joekitch
Date Posted: August 11, 2013 at 10:32 PM

by the way, i'm referring to basically any mercedes e320 from 1998 to 2003 or so. i believe they got rid of the IR system shortly thereafter

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impossible is nothing; use a breakout board.

Posted By: oldspark
Date Posted: August 11, 2013 at 11:47 PM

You might be able to try any universal infrared remote (for TVs etc) with a learning facility.
If they record the actual signal (as opposed to converting it to some "Standard" code) it should work unless rolling codes are used (and assuming suitable infra-red frequency).

Posted By: joekitch
Date Posted: August 12, 2013 at 12:03 AM

oldspark wrote:

You might be able to try any universal infrared remote (for TVs etc) with a learning facility.
If they record the actual signal (as opposed to converting it to some "Standard" code) it should work unless rolling codes are used (and assuming suitable infra-red frequency).

the trick is recording the signal in some way that it's easy to "play back" to the starter circuit when you're starting the car. the play-back would need to be behind the infrared detector in the door but in front of the starter circuit. hence an arduino

there might need to be a staggered thing where it does the IR door unlock and THEN starts the car maybe a second later.

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impossible is nothing; use a breakout board.