From model year 11.2018, it was possible to order an SOS emergency call system - eCall - with our R1200GS (Adventure) or R1250GS (Adventure). With the right means, it can also be retrofitted.
Especially with regard to the acceptance factor among women, it can be advantageous to use things such as active safety as an argument to raise that acceptance factor. Besides an airbag vest, an emergency call system can also help here, and what could be better than retrofitting the manufacturer's own system.
What do we need for this?
The BMW TFT display must be installed.
A BMW dealer who stores our chassis number (VIN) at BMW for the SOS emergency call system.
A wiring harness from a donor motorcycle (since these wires cannot be bought separately).
The right telematics control unit.
left Bosch from 11-2018 - right LG from 11-2019
Control unit BMW #6139467938 (button, microphone, loudspeaker)
Acceleration sensor BMW# 65779496815 and bracket BMW#61358382720 and a few BMW screws
BimmerUtility for coding
ENet cable for the connection (only works with a TFT display)
Once we have all the parts together, we pick the connector for the telematics control unit from the old wiring harness.
Next we pull all wires that run from the control unit to the connector for the acceleration sensor and the operator unit out of the cable duct and insulate them.
What remains is only:
Plus (green/white), minus/ground (brown), CAN_H (blue) and CAN_L (grey)
We cut these cables at the junctions in the wiring harness so that we obtain the longest possible cable lengths. Pay very close attention to the fact that CAN_H and CAN_L are twisted, and this twisting must NOT be opened. (Otherwise there will be errors on the CAN bus later)
Once we have insulated the wiring harness and separated it from the donor wiring harness, the whole thing looks something like this:
Now we stow the telematics control unit behind the battery and run the connector for the control element up to in front of the air filter. The control element is then plugged in there. 
The crash or acceleration sensor is mounted on the left-hand side, behind the radiator or next to the ABS on the frame. On my BMW R1200GS Adventure, all the holes for mounting the sensor bracket were present. I therefore assume that they are present anyway.
Once this is done, we look for permanent positive and the CAN bus in the wiring loom. These wires have the same colours as on our wiring harness. That means: under NO CIRCUMSTANCES attach the CAN bus to the OBDII; that is a different CAN bus and has different wire colours.
When connecting, we separate the wires, prepare one piece of heat-shrink tubing per wire and solder the wires together neatly. Afterwards everything is insulated with the heat-shrink tubing.
Make sure the heat-shrink tubing closes completely and is shrunk watertight. The twisting of the CAN bus may only be opened by 1-2 cm here.
Once everything is done, it is on to coding with BimmerUtility. Here we connect to the vehicle and change the vehicle order. The option 6AC Intelligent Emergency Call is added here.
After saving, a prompt asks whether all the necessary control units should be coded, which we confirm with Yes.
From now on the emergency call should work, but will trigger an error message on the display because your VIN has not yet been stored at BMW. Now your friendly BMW workshop comes into play: it has to register it with a ticket in Munich so that the provisioning of the telematics control unit goes through without errors.
If you hear a non-German voice when pressing the SOS button, your BMW workshop or someone with ISTA+ can change the language setting and you will reach the emergency call centre in your language.
Frequently asked questions (FAQ)
From model year 11/2018, the SOS emergency call system (eCall) can be ordered from the factory for the BMW R1200GS Adventure or R1250GS Adventure. With the matching wiring harness, telematics control unit and acceleration sensor, it can also be retrofitted.
Required are an installed BMW TFT display, a telematics control unit (from Bosch or LG, depending on the model year), an acceleration sensor with bracket, the control element with microphone and loudspeaker, and an ENET cable for coding with BimmerUtility. In addition, the Chassis number (VIN) must be stored by a BMW dealer for the emergency call system.
The twisting of the CAN-High and CAN-Low lines must not be opened when cutting them to length, as otherwise interference on the CAN bus can occur. When soldering, the twisting should be opened by only 1 to 2 cm, and the joint should then be insulated watertight with heat-shrink tubing.