[Solution] Trying to reprogram key for 2020 Mercedes Benz A Class, don’t have PIN

504 views - Last reply: February 06, 2025
This topic is closed for new replies.

How do I find the key code to program a key for my 2020 Mercedes Benz A Class?

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

Replies (5)

This might finally help me unlock my 2020 Mercedes Benz A Class's key code.

Same issue here. Let’s hope it works for my 2020 Mercedes Benz A Class.

My 2020 Mercedes Benz A Class just sits silent—hoping this changes that.

Hope I’m not too late to try this on my 2020 Mercedes Benz A Class.

I can’t believe I found this. Been stuck with my 2020 Mercedes Benz A Class too.

Check the news !

Classic & Vintage Car Rally
🏎️ Local Meetup: Classic & Vintage Car Rally
Where car culture comes alive in your community

🗺️ Where: Local Race Track
When: August 7 @ 11AM-8PM

Event features:
Club Displays | Trunk Swap Meet

🔩 Forum Members: Who's going? Sound off in the comments! 👍

🔩 Classic Car Restoration Workshop

👩‍🏭 Instructors:
• 4x4 Builder Mark Jensen
• Suspension Guru David Klein

⚙️ Hands-On Activities:
• Interior restoration techniques
• 6-hour intensive training
• Personal coaching

📋 Skills Covered:
Paint decontamination | Polishing | Protective coatings

🏎️ August 11, 2026 at 9:00 AM (6-hour)

💡 Tools and materials provided - just bring your enthusiasm!

Workshop: Classic Car Restoration Workshop
Drivetrain Optimization Workshop

🔋 Drivetrain Optimization Workshop

🧰 Instructor: Data Acquisition Expert Priya Patel

📱 Workshop Includes:
• Live dyno tuning demonstrations
• 4-hour intensive hands-on training
• Traction control tuning | Launch control setup

📉 Bonus: Custom tune file included

🔌 Next Session: August 2, 2026 at 10:00 AM

Customize Your Tuning Focus:

🚀 Performance Mod Cost Estimator

Did you know? Proper tuning can add 20-30% more power from the same hardware

Vehicle Information

Modification Information

Additional Options

🔑 Car Key & Fob FAQ

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

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.
Key Tip: Newer cars often require dealer programming for first key replacement
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.
Key Tip: Store your key code separately from your keys
Key Fob Issues
Sometimes. Broken buttons can often be fixed by cleaning or replacing the button pad. Cracked cases can be glued. However, water damage or circuit board issues usually require complete fob replacement. Reprogramming is still needed for replacement fobs.
Key Tip: Keep spare keys in a faraday bag to prevent signal amplification theft
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.
Lost Keys
Costs vary widely: Basic keys: $50-$150, Transponder keys: $150-$300, Smart keys/fobs: $200-$800, Dealership replacements typically cost 20-50% more than locksmiths. Emergency/lockout service adds $50-$150.
Key Tip: Newer cars often require dealer programming for first key replacement
Key Fact: Key fob batteries typically last 3-4 years with normal use

🔑 KEY SERVICES CLASSIFIEDS

Mobile Key Programming Service
$75+
Posted: Jul 20, 2026
Professional car key programming for most makes/models. We come to you! Transponder keys, fobs, and smart keys. Same-day service available. All work guaranteed.
Call: 239-389-9707
Key Fob Repair & Battery Replacement
$25+
Posted: Jul 24, 2026
Fob not working? We fix broken buttons, replace batteries, and resync to your vehicle. Most repairs done while you wait. Water damage specialists available.
Call: 343-562-3973
Smart Key Programming Special
$150
Posted: Jul 25, 2026
Push-to-start key replacement for Toyota, Honda, Nissan, Ford. Includes programming and testing. Limited time offer - normally $200+. Call for availability.
Call: 321-360-9412
Vintage Car Key Restoration
$55+
Posted: Jul 19, 2026
Specializing in classic car keys (pre-1990). Can reproduce hard-to-find keys for antique vehicles. Museum-quality work for collector cars.
Call: 226-313-9768
Ads refreshed daily • Licensed professionals • Mobile services available

🔑 Upcoming Key & Immobilizer Services

Seminar
Aug 17, 2026

Anti-Theft System Demonstration

by Locksmith Pro
In-depth class covering push-to-start systems and proximity key programming techniques
Workshop
Aug 1, 2026

Car Security Certification Course

by The Key Lab
In-depth class covering push-to-start systems and proximity key programming techniques
Workshop
Aug 6, 2026

Dealer-Level Programming Workshop

by The Key Lab
Hands-on training for programming transponder keys, smart keys, and fobs using professional tools
Workshop
Aug 7, 2026

Immobilizer System Seminar

by Auto Key Masters
Become certified in vehicle security systems with our intensive 2-day course

Need immediate service? Call our 24/7 hotline: 1-800-KEY-HELP

Want to list your key service? Join our provider network

Last posts on the forum