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Car Forum / Mercedes-Benz Cars / December 2004

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Remote starter

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Homer Simpson - 10 Dec 2004 19:51 GMT
Now that I've accepted the fact that it'll be at least
another month before we get our E500 wagon, I am beginning
to think about what it will be like once we get it.  Both
our present vehicles are after market equipped with a remote
starter.  Life here in the Nevada desert can get very hot
during the summers.  The remotes we presently have permit us
to leave the auto's engines running for short trips into a
store, or start them remotely prior to leaving a store or
restaurant.  This gives the cooling system time to cool the
interior on a hot day.

The cars cannot merely be driven off, since depressing the
brake or placing the car in gear without the key in the
ignition deactivates the engine.

Our E500 will be equipped with the keyless go system
Mercedes offers.  Does anyone know of a remote starting
system that will work with it?

Homer
Rodney T. Grill - 10 Dec 2004 21:16 GMT
> Our E500 will be equipped with the keyless go system Mercedes offers.
> Does anyone know of a remote starting system that will work with it?

AFAIK, there is no option for remote starting on any MBZ that uses SmartKey.
On the old systems that used the bade keys with a chip, there was a way to
install an aftermarket remote start system.  I believe what they would do
was to break the metal blade off of the valet key, then "embed" the chip
into the system so it could be read by the ECM.  With Keyless Go, you could
enter the vehicle, start it, and then lock it and walk away, thus leaving it
running without the key in it.  Of course the vehicle could still be stolen,
but once the engine is shut down, it could not be restarted without the key.
I'm sure that is not the answer you wanted, but it's all I am aware of.

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Joe C - 10 Dec 2004 21:59 GMT
With keyless go you can not lock the car from the outside with the engine
running.

>> Our E500 will be equipped with the keyless go system Mercedes offers.
>> Does anyone know of a remote starting system that will work with it?
[quoted text clipped - 9 lines]
> not be restarted without the key. I'm sure that is not the answer you
> wanted, but it's all I am aware of.
Rodney T. Grill - 10 Dec 2004 22:37 GMT
> With keyless go you can not lock the car from the outside with the engine
> running.

I believe you can using the "emergency" blade key.

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pkmaven - 13 Dec 2004 23:26 GMT
A remote start can be used with ANY fuel injected car. The GM Passlock
system was the big problem over the last several years, but there is now an
interface which anygood car stereo dealer can employ. Anyone who installs
any of Directed Electronic's starters (Snake brand- Viper, Sidewinder, etc.)
can install in any MB. P.

> Now that I've accepted the fact that it'll be at least
> another month before we get our E500 wagon, I am beginning
[quoted text clipped - 16 lines]
>
> Homer
Homer Simpson - 13 Dec 2004 23:58 GMT
> A remote start can be used with ANY fuel injected car. The GM Passlock
> system was the big problem over the last several years, but there is now an
> interface which anygood car stereo dealer can employ. Anyone who installs
> any of Directed Electronic's starters (Snake brand- Viper, Sidewinder, etc.)
> can install in any MB. P.

The wagon has the keyless go system.  Will that make a
difference?

Homer

>>Now that I've accepted the fact that it'll be at least
>>another month before we get our E500 wagon, I am beginning
[quoted text clipped - 16 lines]
>>
>>Homer

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Rodney T. Grill - 14 Dec 2004 14:50 GMT
>A remote start can be used with ANY fuel injected car. The GM Passlock
> system was the big problem over the last several years, but there is now
[quoted text clipped - 3 lines]
> etc.)
> can install in any MB. P.

GM's system uses a static "code", if you can even call it that.  It's
actually reading a resistor on the key.  Those interfaces they sell simply
measure the resistance from the key, store the value and then duplicate it,
thus fooling the ECM.  There are even very easy ways to totally disable the
GM system without any special interfaces.

MBZ's SmartKey system uses a digital rolling code to communicate with the
ECM.  Without receiving the correct code, the ECM will not allow the engine
to start.  Keyless Go is the same implementation, but instead of requiring
the code to be transmitted via an infrared signal through the ignition
switch, it receives the signal via a two-way radio frequency communication.
The way I see it, there are only two methods where an aftermarket  remote
start system could be implemented.  One, would be for MBZ  to provide some
sort of interface to allow this and the other is that the ECM would have to
be modified or replaced so that it does not require the coded message.  We
all know that MBZ's track record for providing electronic interfaces for
third party accessories (as in they don't) so the only other option I see is
to modify the ECM or replace it with one that would allow engine starting
without the coded message from the SmartKey.  Personally, I wouldn't screw
around with the ECM on my MBZ.

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