Thanks volvolover, but it didn't work. I actually tried your sequence for 24+ hours (I had a slow charger on the car this time so that my battery wouldn't die) with no luck. The radio continues to dumbly stare at me with 'OFF' displayed. Perhaps there's a small coin-type battery in the radio which i...

I bought an '89 760 Turbo Intercooler Wagon about two months ago. When I bought the car I watched the former owner try to enter the code on the sr-7145 radio (with tp 7145 ) while the display showed 'codE'. He had just replaced the battery. After 3 attempts the unit locked down and displayed 'OFF'. ...