Couple of questions regarding this problem.

Vehicle is a 2006 E350 produced in March 2006(211.056), with SA codes...

- 359 (low cost TeleAid USA)
- 494 (U.S. version)
- 530 (COMAND DVD APS USA with navigation)
- 536 (SIRIUS satellite radio complete system).


The latest fault code check now reveals:

DTC Code TeleAid Control unit

D612 Component GPS antenna or the lead has short circuit.

D631 Component CTEL antenna or the lead has short circuit


DTC Code NAVI – Navigation system

D302 The cable to the GPS antenna has a short circuit


The GPS antenna (component A2/49a2) and the CTEL antenna (component A2/49a1) are attached above the heating field of the rear window.


1) What is the procedure for removing this CTEL/GPS housing; is it simply affixed to the rear windshield with an adhesive foil?

2. Are the visible wires at the top of the rear windows actually part of the CTEL/GPS antennas? If so, then its possible that the short may exist with the rear window itself and thus require replacement of the glass?