[Update] 2017 Mercedes Benz GLS 450 key not recognized - what code should I enter?

181 views - Last reply: September 15, 2024
This topic is closed for new replies.

Trying to program a new key for my 2017 Mercedes Benz GLS 450 - where's the key code?

Hello! We've developed a VIN-based tool to help you get your key code for the 2017 Mercedes Benz GLS 450. Check it out here: VIN Key Code Generator.

Replies (3)

My 2017 Mercedes Benz GLS 450 won’t start without that code. Following this closely.

Trying this on my 2017 Mercedes Benz GLS 450 later. Will report back.

Anyone have luck with this on a 2015 2017 Mercedes Benz GLS 450?

Check the news !

Tuner Car Showdown
🚙 Local Meetup: Tuner Car Showdown
No trophies, just cool cars and cool people

🏁 Where: Regional Airport (static display area)
📆 When: May 8 @ 10AM-8PM

Event features:
Cruise Night | Raffle Prizes | Food Trucks

⚙️ Forum Members: First 50 forum members get free dash plaques! ✨

🔧 Hands-On Engine Tuning Workshop

👨‍🔧 Instructors:
• Race Engineer Emily Torres
• Safety Inspector Robert Yang

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

📝 Skills Covered:
Paint decontamination | Polishing | Protective coatings

🚗 May 12, 2026 at 10:00 AM (6-hour)

🔥 Certificate of completion provided!

Workshop: Hands-On Engine Tuning Workshop
Data Logging & Analysis Bootcamp

🏁 Data Logging & Analysis Bootcamp

🔧 Instructor: Data Acquisition Expert Priya Patel

💻 Workshop Includes:
• Boost control mapping exercises
• 4-hour intensive hands-on training
• Fuel system upgrades | Injector sizing | Pump flow

📈 Bonus: Exclusive tuner network discounts

⏱️ Next Session: May 11, 2026 at 4:00 PM

Customize Your Tuning Focus:

🚀 Performance Mod Cost Estimator

Insight: Suspension mods should match your intended use (street vs track)

Vehicle Information

Modification Information

Additional Options

🔑 Car Key & Fob FAQ

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

Security Systems
This means your car's immobilizer system can't read the key's transponder. Causes: dead key battery, damaged transponder chip, faulty car antenna ring around ignition, or system needs resetting. Try replacing the battery first.
Key Tip: Always have at least two working keys to avoid expensive replacements
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 Tip: Newer cars often require dealer programming for first key replacement
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 Tip: Replace key fob batteries every 1-2 years as preventative maintenance
Security Systems
Not recommended. Bypassing requires specialized knowledge and may violate anti-theft laws. Proper solutions: 1) Get correctly programmed keys 2) Replace faulty immobilizer components 3) Have dealer reset the system if keys are lost.
Key Fob Issues
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 Fact: Key fob batteries typically last 3-4 years with normal use

🔑 KEY SERVICES CLASSIFIEDS

Mobile Key Programming Service
$75+
Posted: Apr 25, 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: 315-577-5955
Lost Car Key Replacement
$120+
Posted: Apr 28, 2026
Lost all your keys? We can cut and program new ones even without originals. Dealership alternative at 40% less. Proof of ownership required. Serving all major brands.
Call: 790-304-0274
Key Fob Repair & Battery Replacement
$25+
Posted: Apr 27, 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: 447-301-5831
Transponder Key Duplication
$65+
Posted: Apr 19, 2026
Get spare keys made before you lose yours! Cuts and programs most transponder keys on the spot. Cheaper than dealerships. 15+ years experience.
Call: 298-562-9290
Ads refreshed daily • Licensed professionals • Mobile services available

🔑 Upcoming Key & Immobilizer Services

Workshop
May 11, 2026

Mobile Key Programming Clinic

by Immobilizer Experts
Learn how to extract key codes from VIN numbers and decode vehicle security information
Workshop
May 3, 2026

Anti-Theft System Demonstration

by Fob Fixers
Step-by-step instruction for repairing common key fob issues including button and circuit problems
Seminar
May 21, 2026

VIN Decoding Workshop

by Immobilizer Experts
Learn dealer-level programming techniques normally only available at franchise shops
Workshop
May 1, 2026

Car Security Certification Course

by VIN Decoder Pros
Learn how to extract key codes from VIN numbers and decode vehicle security information

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