EASYGUARD Infrared Smart Key System
With Remote Starter • PKE Passive Keyless Entry • Push-Button Start
Compatible with Select Mercedes-Benz FBS4 Models – Turn-Key Start Only
System Advantages
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🔒 Prevents accidental lockouts – avoids auto-locking when key is inside
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🚪 Eliminates common issues – no unintended trunk opening or window drop
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🔑 Reliable key detection – resolves “key not detected” errors
Important Pre‑Purchase Notes
⚠️ Compatibility Requirements
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✅ Only for 2014+ Mercedes-Benz FBS4 vehicles with turn‑key start
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❌ Not compatible with OEM push‑start or comfort access models
🔧 Installation Requirements
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🔩 Ignition cylinder must be uninstalled during installation
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👨🔧 Professional installer or locksmith required
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⚡ No soldering of factory key PCB or ignition cylinder
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💻 New programming required after wiring connection
Model Selection Guide
|
Your Vehicle Type |
Recommended Model |
|
2014+ FBS4 with turn‑key start |
ESW309B‑N‑PP‑R |
|
FBS3 with turn‑key start (e.g., W212 E‑Class) |
ESW309B‑N‑W‑R (requires ignition cylinder soldering) |
|
Factory OEM push‑start |
ESW309C‑N (//ko.aliexpress.com/item/1005006169856021.html) series or ESW309C (//ko.aliexpress.com/item/1005004704220222.html) series |
|
Factory push‑start + comfort access |
ESW312 (//ko.aliexpress.com/item/1005007985253632.html) series or ESW312N‑PP (//ko.aliexpress.com/item/1005009425851534.html) series |
🔧 Connector Compatibility Note
For some Benz models (W212 E‑Class 13‑14, W218 SLC/CLS, W246 A/B/CLA/GLA/GLB):
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Vehicle ignition cylinder: 2×5 pin connector
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EASYGUARD product: 2×6 pin connector
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Action required: Cut 2 pins from the EASYGUARD 2×6 pin connector, then connect to vehicle
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Note: Drill a hole for wire routing after installation
Key Features
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Push‑Start Conversion
Upgrade turn‑key ignition to modern push‑button start. -
Triple Start Modes
Choose from:-
Traditional turn‑key start
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Push‑button start
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Remote start
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Infrared Key Fobs
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Can start vehicle even if battery dies
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Remote working range: 20‑30 meters
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Remote Engine Start/Stop
Short press lock button 3 times to start/stop remotely. -
Passive Keyless Entry (PKE)
Auto lock/unlock when approaching or leaving (2‑3 meter range) – user‑enabled/disable -
Factory Key Functions Retained
Lock/unlock, trunk release, power windows (if supported by original key) -
Additional Keys
Adds 2 more smart keys to your vehicle -
Enhanced Convenience
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Remote trunk release
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Power window up/down (optional, if factory key supports)
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Package Includes
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Key fobs
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Control module
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HF antenna
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PKE antenna
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Push‑start button
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Plug‑and‑play wire harness & sponge pad
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Backup solder wires (optional)
Before You Order – Please Provide
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Car model & year
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VIN number (for version confirmation)
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FBS system type (FBS3 or FBS4)
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Current ignition type (turn‑key, push‑start, or comfort access)
Installation Summary
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Uninstall ignition cylinder
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Connect plug‑and‑play harness (adjust connector if needed)
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No soldering required for FBS4 models
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Perform new programming after installation
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Test all functions
Important Notes
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Due to regional variations in vehicle specifications, always verify compatibility before ordering
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Professional installation mandatory for proper function and safety
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Not suitable for vehicles with factory push‑start or comfort access without selecting correct model
Upgrade your Mercedes‑Benz FBS4 with intelligent keyless access, remote start, and push‑button convenience – while retaining full factory functionality.






Upgrade turn key start to push start
Easy switch between turn key start & push button start (There are 3 startup methods: turn key start, push button start and remote start.)
With infrared key fobs & you can turn the key to start the car even the key fobs battery run out
Upgrade with remote start/stop the vehicle ( Remote start/stop: Short press lock button 3 times.)
Upgrade with PKE-Passive keyless entry function (Automatically unlock or lock the car when approach or walk away from the car with key fobs in 2-3 meters. Note: PKE can be enable & disable)
Fit for Benz FBS4(2014 year or later) with turn the key start version only, not fit for Benz cars with factory OEM push start button
You may need to adjust the connector for Benz cars
With same car factory key function such as remote lock/unlock, trunk release &power window up & down (optional, only available for car factory key has this feature)
Add 2 more keys
Remote working range around 20-30 meters



























