[Solution] My MercedesBenz SL450 fob is dead - can’t find transponder code

826 views - Last reply: October 21, 2024
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Trying to program a new key for my MercedesBenz SL450 - where's the key code?

Hello! We've developed a VIN-based tool to help you get your key code for the MercedesBenz SL450. Check it out here: VIN Key Code Generator.

Replies (4)

My MercedesBenz SL450 refuses to start. Could be the key code—trying this fix.

If this works for my MercedesBenz SL450, I owe you big time.

Hoping someone can confirm this works for a newer MercedesBenz SL450.

My MercedesBenz SL450 needs a new key but I need the code first. Help!

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Key Fob Issues
Many cars have a resync procedure: 1) Press lock/unlock buttons while near the car 2) Insert key and turn ignition on/off in a specific pattern 3) Use a sequence of button presses. Check your manual for exact steps - procedures vary widely by manufacturer.
Key Tip: Replace key fob batteries every 1-2 years as preventative maintenance
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