[Fixed] Aftermarket key programming for 2020 Mercedes Benz E 450 without code

4111 views - Last reply: March 22, 2025
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Where can I locate the key code to program a 2020 Mercedes Benz E 450 key?

Hello! We've developed a VIN-based tool to help you get your key code for the 2020 Mercedes Benz E 450. Check it out here: VIN Key Code Generator.

Replies (3)

Fingers crossed this works for my 2020 Mercedes Benz E 450 too.

Worked for someone with a 2020 Mercedes Benz E 450? Need to hear it!

My 2020 Mercedes Benz E 450's been in the garage for a week over this. Thanks!

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Common questions about key programming, fob issues, and replacement options

Key Fob Issues
1) Find the seam and pry open the fob (some have tiny screws) 2) Note battery orientation 3) Remove old battery (CR2032 is most common) 4) Insert new battery 5) Reassemble. Test all buttons - if issues remain, the fob may need reprogramming.
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Key Programming
Common reasons: wrong key type for your vehicle, anti-theft system needs reset, low car battery voltage during programming, or the key isn't properly synced. Some cars also have programming limits (only 2-4 keys can be registered).
Key Programming
Some vehicles allow DIY key programming using specific sequences (like turning ignition on/off with original keys). However, most modern cars require specialized equipment only locksmiths or dealers have. Check your owner's manual for your specific model.
Key Programming
Programming syncs the key's transponder chip with your car's immobilizer system. The process varies by manufacturer but generally involves: 1) authenticating with the car's computer 2) erasing old keys if needed 3) programming new key codes 4) testing functionality.
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