Date registered: May 2013
Vehicle: 2006 S 500
Location: near Dallas, Tx
Mentioned: 10 Post(s)
Quoted: 116 Post(s)
There being just the one connector to blower controller (A32n1), voltage, ground and LIN ( Local Interconnect Network )... and noting that your tried a second A32n1 module, very slim chance both are bad. But it could happen.
Check the plug and the connector for bent/misaligned pins, especially for the Blue/Green wire ( LIN connection). If all is well you may need to get to the back of the center console control unit and see if the connection to it is secure with all the pins where they are supposed to be etc. Physical integrity of the LIN wire is next I guess. Having to pretty much remove the entire dash assembly for the core replacement, wire may have been cut somewhere.
May have to have all the codes cleared. There are reset procedures for the C, E and S class but cant find anything specific for the 07 CLS. STAR may be your only answer at that point.