SLK/R171: One Touch Automatic Roof
http://www.pigzmickey.pwp.blueyonder.co.uk/
You can order direct from Germany, and the service is excellent.
I ordered my rear lip spoiler and aerowings there, I recently just ordered the roof module and it should be here tomorrow or the day after.. woohoo...
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To simplify, the roof module do not receive a signal from your remote. Your car's security system receives the rolling signal code then sends voltage to your vehicle locks. The roof module reads this voltage. The roof module will open or close the roof when you push the open or close button on your remote 3 times.
I ordered the module listed on the link by etyu. It cost less and is easer to install.
Is there just one unit out there or a couple different units? Pigzmickey is selling a unit and bakerdbl26 purchased a unit, are they the same?
Pigzmickey, I didn't realize you were in the security space until I looked at your homepage. Check out http://www.xaveon.com or the online store at: http://www.xaveonsecurity.com
Also, what is the ordering process for these units? Do you have the install instructions available (maybe as a PDF)? Thanks!
Thanks.
Thanks.
This is an interesting product. I want to wait until several members have purchased, installed, and tested, to determine which product is the determined the best. Looking forward to additional input.
This is an interesting product. I want to wait until several members have purchased, installed, and tested, to determine which product is the determined the best. Looking forward to additional input.
This is an interesting product. I want to wait until several members have purchased, installed, and tested, to determine which product is the determined the best. Looking forward to additional input.To simplify, the roof module do not receive a signal from your remote. Your car's security system receives the rolling signal code then sends voltage to your vehicle locks. The roof module reads this voltage. The roof module will open or close the roof when you push the open or close button on your remote 3 times.
I ordered the module listed on the link by etyu. It cost less and is easer to install.
But I'm happy to be corrected/educated, as I am curious on the actual design. :roll eyes:
I was putting it in a simple form so non tech people can understand. Rember, commands are carred by low voltage.
My point is the module do not receive a signal from your remote key. That is why the same module can be used in all the R171s.
But I'm happy to be corrected/educated, as I am curious on the actual design. :roll eyes:

http://shop.piecha.com/catalog/produ...08e50ce0b7287e
I was putting it in a simple form so non tech people can understand. Rember, commands are carrd by low voltage.
My point is the module do not receive a signal from your remote key. That is why the same module can be used in all the R171s.
Most (all?) other aftermarket devices like this DID have to actually sense door lock solenoid power, among other signals, and then insert themself and apply timing signals/voltage to simulate a human doing things. It was very much a band-aid approach, though there are some good products. They didn't have a choice. In fact for some of them, on some car models, you actually had to have a spare key (or at least the security-chip) mounted in the car (under the dash), to get around the fact the ignition had to be at least in accessory mode. Other ones had to have a separate (additional) FOB and an additional RF receiver mounted in the car. All, in all, very messy.
My BELIEF, based on a my experience in "observing to reverse engineer" is:
We are lucky in that MB actually implemented a "remote" top control sequence (to support the optional IR key fob control, I suppose), EVEN though the IR FOB control is optional, the control sequence is programmed in all the cars. This means the control computer can control the top, even WITHOUT the key being in the ignition (obviates the need to have a key security chip mounted in the car).
Additionally, MB uses the CANBUS for all distributed functions, allows the installation of this part to be very simple. Again, for other vehicles, the installation typically required a number of wire attachments and wire cuts to different signals/controls.
The hard part was finding someone that understand the CANBUS command sequences (communication protocols and specific commands) to right the code to watch for commands routing thru the bus, and then to insert the command sequences needed.
I am VERY impressed with this product. It is well done (but again enabled by the "architecture" of the MB car control).
I believe it works like this:
FOB RF receiver (standard in the car) receives UNLOCK (or LOCK) from the FOB. The RF receiver generates the UNLOCK command sequence on the CANBUS. The standard door lock solenoid function sees the UNLOCK command on the BUS and energizes the door lock solenoid (and the lights to blink). Our NEW module also sees the UNLOCK command go by on the bus and starts counting. Then it sees a second one, then a third one (within a certain timeframe). It then inserts a command onto the CANBUS of Top Open that routes to the Convertible Top controller. Similar for LOCK.
The new module also monitors for a lock (or unlock) during the top cycle, and will issue a Top Stop command. It also monitors for a door key unlock or an ignition switch, etc.
Further, if it counts an additional 3 UNLOCKS, and it has seen a TOP DOWN COMPLETE Command Status, it then issues a WINDOWS DOWN command that the window controller receives.
For the button inside, not clear to me how that might work. Obviously the standard control requires the button to be held for 22 seconds. I would guess the button generates a Top Control Button Back (or Forward) repeatedly (or it is continuously sampled) and the standard Top Control will see the interruption if you let it go. Our module must see the 1 second hold, and generate the Top down command, and either block (capture) the button release so the standard control does not issue a Top Stop or it is able to tell the standard control it is not needed to control.
Finally the top down at speed, is similar, in that it interprets (or intercepts) the button push and issue the cycle, not allowing the standard control to be involved (as it would stop the cycle).
Then they also implemented a look for PHONE END and disable the module from CANBUS, as well as the speed limit setting function.
Again, all in all, very impressive and very clean.
Note: All of the above is my speculation , as I have absolutely NO knowledge of how MB CANBUS and control works.
If anyone knows better, please correct me, as I like to learn.


