[Update] Replaced steering column, now 2003 Mercedes Benz S Class won’t start - code?

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Where's the key code stored on a 2003 Mercedes Benz S Class for programming keys?

Hello! We've developed a VIN-based tool to help you get your key code for the 2003 Mercedes Benz S Class. Check it out here: VIN Key Code Generator.

Replies (5)

My 2003 Mercedes Benz S Class's key code has been a nightmare. Trying this now.

Trying to reprogram a new key for my 2003 Mercedes Benz S Class—need the code first.

Hope I’m not too late to try this on my 2003 Mercedes Benz S Class.

Worked for someone with a 2003 Mercedes Benz S Class? Need to hear it!

Just what I needed! My 2003 Mercedes Benz S Class has been acting up lately.

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Locksmiths are typically 30-50% cheaper than dealerships for key replacement and programming. However, some newer models (especially luxury brands) may require dealer-only programming tools. Always get quotes from both.
Cost & Options
Locksmiths are typically 30-50% cheaper than dealerships for key replacement and programming. However, some newer models (especially luxury brands) may require dealer-only programming tools. Always get quotes from both.
Key Tip: Avoid exposing key fobs to water or extreme temperatures
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This typically indicates: weak fob battery (replace first), damaged fob antenna, or issues with your car's receiver (often in the door handle or rearview mirror). Environmental interference from other electronics can also reduce range.
Key Programming
Most transponder keys and smart keys can be reprogrammed if they haven't been damaged. Basic mechanical-only keys (no chip) can't be reprogrammed - they must be physically cut to match your locks.
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