Hello, I'm from Austria, have an XLR, 2004, with about 40,000 miles and the roof has been causing me problems for some time. An XLR is very rare in Austria, so Cadillac dealers don't really know what to do. The last report from a Cadillac workshop was that the hydraulic pump was defective. Every time I knocked on the hydraulic tank, the pump suddenly worked and the roof opened or closed. Now I removed the pump, it looked like new, and had it overhauled by Top Hydraulics in the USA. After installing the pump, the switch for the roof did not respond at all. Now I removed the top module and had it repaired by an electronics technician, I had all four relays replaced, two of which were defective. The same problem after installation. I have to mention that I operated the trunk lid with the switch and the lid closed, but at the front right it didn't close completely. I have a cheap diagnostic tool that can detect errors and clear them. But the error: Folding Top Module B3669 DTC Description unavaiable 1. last test failed, 2. since clear history - cannot be deleted. In the forum I found 3669 - Folding rear tap signal open. What does that mean? The electronics technician says that the module is now OK. I'm a little desperate. Should I shut down the battery for a long time so that the computer restarts or do I have to relearn the module or even buy a new one? I would be very, very grateful for help, Franz