2c2d in hexadecimal converts to 11309 in decimal btw which looks like it could be a BMW fault code. The Bentley manual for the E53 shows the BMW codes and equivalent P-code but I don't know if there exists something like that for the E70. BMW diagnostic software (with TIS built in) might even show you the correct flow chart (and maybe even wiring diagram and diagnostic strategy) for the code retrieved.

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1988 325is (purchased new) sold
2004 X5 3.0 2005 X3 2.5
2008 X5 3.0 (new to me)