Steering/Starting - No Crank/Start/ESL And ICM Don't Respond No Crank/No Start/ESL and ICM do not respond to key input

2010 Mercedes Benz C 63 AMG Sedan (204.077) V8-6.3L (156.985)

Vehicle: All Technical Service Bulletins
Steering/Starting - No Crank/Start/ESL And ICM Don't Respond
No Crank/No Start/ESL and ICM do not respond to key input
Topic number LI80.57-P-051521
Version 1
Design group 80.57 Drive authorization systems (DAS)
Date 06-01-2011
Validity All 204, 207 model vehicles
Reason for change
Complaint
1. No crank / no start / intermittent no crank
2. Communication via SDS to Electronic Ignition Switch N73 (EIS/EZS), and or short test may or may not be possible at time of fault
3. Below scenario:
^ When accessing the occupants compartment, the message center in the ICM will illuminate (note: eventually the message center will time
out and shut down, and will not illuminate until the CAN is activated via the interior lock/unlock switch).
^ The key will turn in EIS N73.
^ The ESL N26/5 does not activate/respond (or the steering wheel remains unlocked at all times).
^ The warning icons in the ICM will not illuminate.
Cause
Internal issue with in Electronic Steering Lock N26/5 (part number A 204 545 57 32)
Remedy
First perform a complete guided test of the drive authorization system, and transmitter key via the "Tests" menu in the EZS control unit.
Fault codes A25408 and A25464 in the Electronic Ignition Lock N73 (EIS/EZS) direct you to replace the Electronic Steering Lock N26/5.
NOTE:
If no fault codes are stored, do not replace any parts!
Check the part number on the Electronic Steering Lock N26/5. If the part number is A204 545 57 32, please replace with part number A 204 545 81
32 using WIS instructions AR46.10-P-0910CW.
If the part number of the Electronic Steering Lock is A 204 545 81 32, please contact Dealer Technical Support; we would like to have the part
shipped to us for further analysis.
Note:
It is possible to corrupt the Electronic Ignition Switch N73 if it is replaced prior to replacement of the suspect ESL. Also, insure that the CAN does
not time out before the programming of the ESL with the workshop key is completed.
2010 Mercedes Benz C 63 AMG Sedan (204.077) V8-6.3L (156.985)

Symptoms
Control unit/fault code
Parts
Operation numbers/damage codes