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Mercedes S-Class W221 Deadlock Module Failure — Mercedes-Benz S-Class 2005 | MyCarFault
⚪ UNSOLVED No confirmed fix yet · Be the first to help

Mercedes S-Class W221 Deadlock Module Failure

Mercedes-Benz S-Class 2005 All
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⚡ Quick Summary
Severity Level
Medium
Safe to Drive?
✅ Safe to Drive
Safety Impact
No direct safety impact reported by owners
Urgency Level
🟡 Monitor Closely

The deadlock module on W221 S-Class fails causing the deadlock function to not engage or doors to not lock remotely. Door module replacement with Mercedes STAR coding: £200-500.

Repair / Solution

No confirmed fixes yet. Share yours below.

⚠️ Wrong Diagnosis?

No commonly reported misdiagnoses for this fault yet. If you have replaced a part that did not fix this Mercedes-Benz S-Class 2005 problem, submit a wrong diagnosis report — it helps other drivers avoid the same costly mistake.

🚗 More About This Vehicle

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