Hello, could someone please tell me where the relay for the rear window heating is sitting at the Opel Omega A Caravan bj.88, 2.0 (Schl. No. 0039-685)? When I press the switch, it lights up briefly yellow (part of a second) and then extinguishes again after a click on the left side of the steering wheel.In the switch box there are up (1st row) 3 black relays, the 4th connection to the right is bridged (apparently from factory) and on the right in the 2nd row from above a smaller grey relay. One is still sitting in the engine compartment under a black cap. From the driver’s seat left under the disc. Nobody can help me, not even a Opel contract workshop. The vehicle is “too old”. But it is in a great condition, LPG has got inside and in November 2011 TÜV without any defects.