B0105moderate severityBody
Immobilizer Key Count Exceeded
on 2002 Mercedes-Benz SL 3.0L I6 · RWD
What this code means
The maximum number of keys programmed to the immobilizer system has been exceeded or the key count is invalid.
Symptoms
- Cannot program additional keys
- Security light on
- Key programming procedure fails
Common causes
- All key slots used
- Immobilizer memory error
- Unauthorized key programming attempt detected
- Module requires reset
Diagnostic steps
- Check number of keys programmed
- Attempt key count reset procedure
- Scan immobilizer for stored key data
- Verify key programming with dealer tool
Repair notes
Use dealer tool to reset key count and reprogram all valid keys.
Other Body codes on this vehicle
B0001
Driver Frontal Stage 1 Deployment Control
B0002
Driver Frontal Stage 2 Deployment Control
B0003
Passenger Frontal Stage 1 Deployment Control
B0004
Passenger Frontal Stage 2 Deployment Control
B0005
Driver Knee Airbag Deployment Circuit
B0006
Passenger Knee Airbag Deployment Circuit
B0010
Driver Side Airbag Deployment
B0011
Driver Side Airbag Deployment Circuit Open
B0012
Driver Side Airbag Deployment Circuit Short to Ground
B0013
Driver Side Airbag Deployment Circuit Short to Battery