⚠️ DIGITAL UNLOCK SERVICE ONLY — NO PHYSICAL RADIO UNIT SHIPPED

This listing provides the original factory anti-theft security PIN code to reactivate your existing locked Mercedes-Benz stereo. No physical parts, cables, or hardware will be mailed.

Mandatory Verification Steps Required Prior to / At Purchase

To prevent incorrect lookups and eliminate delays, service generation cannot proceed until both conditions are submitted via eBay Messaging:

Condition A — Send Exact Unit & Vehicle Details:

Send an eBay message specifying your vehicle model, year, and the exact prompt shown on your radio display (e.g., "CODE", "PROT", or "Anti-Theft").

Condition B — Attach Clear Photo of Casing Label:

Extract the radio and upload a sharp picture of the white/silver Alpine manufacturer sticker on the top or side metal casing, clearly showing the Part Number (A203 900 01 00 / A203...) and the 14-character Serial Number (starting with AL3890, AL2830, or AL2840).

Service Overview & Anti-Theft Reactivation

Following battery maintenance, alternator drain, or swap into a replacement car, Alpine-manufactured Mercedes-Benz Audio 20 / Audio 50 units lock into security mode to safeguard against theft.

  1. Carefully remove the center upper vent and gear surround to unbolt the radio unit.
  2. Identify the 14-character serial number stamped on the Alpine sticker (e.g., AL389081234567).
  3. Complete your purchase and message the label photo through eBay Messages.
  4. Receive your OEM factory security unlock code directly in your eBay inbox.

Hardware Compatibility Matrix

Vehicle Model Model Years Supported Units & Part Numbers
Mercedes-Benz CLC-Class (CL203) 2008 – 2011 Alpine MN3890 / Audio 20 CD
A2039000100, A2038703694
Mercedes-Benz C-Class (W203 Facelift) 2004 – 2007 Audio 20 / Audio 50 Systems
A2039000100, A2038703394, A2038704589
Mercedes-Benz CLK-Class (W209) 2005 – 2009 Facelift Center Stack Radios (Alpine MN38xx)
Mercedes-Benz G-Class (W463) 2007 – 2012 Integrated Facelift Alpine Head Units
Excluded Systems Pre-facelift W203 units (2000–2003 with D2B optical bus, Becker Audio 10 BE6019/BE6021) and newer NTG 4.0/4.5 units are NOT covered by this listing.

PIN Code Input Procedure

  • Turn the ignition key to position II (ON) and power on the radio.
  • The display will prompt with CODE or numeric entry dashes (- - - - -).
  • If WAIT appears, incorrect codes were previously keyed. Keep the unit powered with the vehicle ignition on for 30–60 minutes until the timer expires.
  • Use the front alphanumeric keypad (0–9) or turn the right rotary dial to highlight and select each digit of the code.
  • Press the OK softkey or push the rotary knob inward to validate. The radio will unlock and resume audio playback immediately.

100% Factory Database Match & Money-Back Guarantee

All codes are queried directly against genuine manufacturer telematics database tables. In the rare event that a retrieved code does not reactivate an unmodified, operational unit, provide a continuous video recording showing the serial label on the chassis and the entry sequence on the screen for a prompt 100% refund.