Push Button Start with Passive Device Key wanted

[wmhjr]

Just read this thread first time wow.. I have this system in my Mercedes I really like that it offer both a key and push start. But what I like in my system is the car does no unlock when you walk up to it, you have to touch the door handle to open the door, which then unlocks all doors. Does any one know how this is done?

John

Actually it does not unlock when you touch the door handle. It unlocks when you physically move the inside of the handle I have an '08 E class. I believe that when the inside movable piece is disturbed, a signal is sent to the computer, which then scans to see if it detects the RF signal of the key fob, and if it does it unlocks the vehicle - exactly the same for when you press the start button on the shifter. Similarly, it is another mechanical small black switch on the outside door handles which when pressed locks the car. For those not in the know, that's the easy way to determine if a Mercedes has "Keyless Go". Another kind of cool feature of this system is that the keyfob is both rf and IR. There are IR sensors in the front doors, and an IR transmitter in the fob, allowing you to open and close windows and the sunroof while standing outside the vehicle.

The down side of the Mercedes technology is that the key fobs are not linked (in newer vehicles) to things like seat and mirror positions, as they are with Infinity for example. Mercedes used to do this, but stopped sometime around '06 or so - depending on the model. But it is a great system. It's nice never ever messing with a key.

[jtm311]

You are correct I should have better explained it. I have the 07 E55 and in 07 they still change the seats and other features

John

Maybe time to find a wrecked E class, I would love to pull the front and rear seats along with the key less system for my 69 camaro

[wmhjr]

You are correct I should have better explained it. I have the 07 E55 and in 07 they still change the seats and other features

John

Maybe time to find a wrecked E class, I would love to pull the front and rear seats along with the key less system for my 69 camaro

The E55 is a great car. Mine is a daily drive and I need AWD, so no AMG for me. My understanding is that as a result of the Daimler-Chrysler experiment and quality issues, they decided to remove some options (in the US) in order to prevent support requests and increase quality ratings. That's apparently why in the US they got rid of the keyfob specific seat/wheel/mirror settings as well as things like the reverse mirror turn-down (that even my '00 CLK had) - though those features still exist for cars sold and delivered in other markets.

You'd need way more than the seats and the specific keyless go, you'd need the entire ECM as far as I know. It's an interesting thought, but would probably be a whole lot of effort - I think there's some CAN-BUS stuff, and who knows what else.