The automatic antenna in your Mercedes-Benz R107 is a feature designed to optimize radio reception while maintaining the classic aesthetics of the vehicle. Proper use of the antenna system ensures clear signal reception, prevents damage during car washes or low-clearance areas, and maintains its longevity.
1. Understanding the Automatic Antenna Switch Positions
Your R107’s antenna can be adjusted using the antenna switch, located near the radio controls. It has three main positions:
🔹 MAX Position:
- The antenna extends fully to maximize signal reception.
- Ideal for highway driving or areas with weak radio signals.
🔹 Center Position (Medium Height):
- The antenna automatically extends to a medium height.
- It can be manually adjusted by rocking the switch up or down without fully engaging it.
- Suitable for urban areas with strong radio signals where full extension is unnecessary.
🔹 OFF Position:
- The antenna retracts completely and will not extend, even when the radio is on.
- Recommended for car washes, low-clearance areas, or when not using the radio.
🛠 Automatic Retraction:
- The antenna automatically retracts when the radio is turned off or the ignition key is turned to the steering lock position 0.
2. Adjusting the Antenna for Optimal Performance
The height of the antenna directly affects radio reception. Use the appropriate setting based on your location:
✔ Highway & Rural Areas: Use MAX position for maximum range.
✔ City & Suburbs: Use medium height to avoid excessive extension while maintaining reception.
✔ Poor Reception Areas: Manually fine-tune by rocking the switch for the best signal strength.
3. Protecting Your Antenna: Car Wash & Low Clearance Areas
🚗 Before entering an automatic car wash:
- Engage the switch in the OFF position to fully retract the antenna.
- This prevents the bending, breaking, or jamming of the antenna mechanism.
⚠️ If the antenna does not retract fully:
- Do not force it manually. Use the switch to cycle it up and down.
- If the issue persists, clean and lubricate the antenna mast to remove dirt buildup.
4. Troubleshooting Common Antenna Issues
Antenna Fails to Extend or Retract
🔧 Possible Causes:
- Faulty antenna motor or switch.
- Dirty or corroded antenna mast.
- The radio power issue is affecting automatic function.
✅ Solution:
- Listen for motor noise: If you hear the motor but the antenna does not move, clean the mast with lubricating oil.
- Check the fuse: A blown fuse can disable the antenna system.
- Verify wiring connections: Loose or corroded connections can prevent operation.
Antenna Extends But Doesn’t Retract Fully
🔧 Possible Causes:
- Dirt and debris buildup in the mast mechanism.
- Worn gears in the antenna motor.
✅ Solution:
- Clean the antenna mast with a soft cloth and apply a light coating of silicone lubricant to reduce friction.
- Test manual operation using the switch to see if partial movement is possible.
Antenna Stuck in One Position
🔧 Possible Causes:
- Faulty switch or relay.
- Antenna gears may be jammed or broken.
✅ Solution:
- Check the switch function by testing different positions.
- Manually assist the antenna by gently pulling it while engaging the switch.
- If the problem persists, consider replacing the antenna motor.
5. Maintaining the Automatic Antenna System
🛠 Routine Maintenance Tips:
✔ Clean the antenna mast regularly to prevent dirt buildup.
✔ Lubricate the antenna with silicone oil to keep movement smooth.
✔ Test the antenna operation periodically to ensure proper function.
✔ Avoid forcing the antenna manually—always use the switch to adjust its height.
Final Thoughts
The automatic antenna in your Mercedes-Benz R107 enhances radio reception and maintains the classic look of your vehicle. By understanding its functions, maintaining cleanliness, and preventing unnecessary damage, you can keep it operating smoothly for years to come.
