Why Your GLS CLASS TPMS Needs Attention During Seasonal Tire Swaps
The Mercedes-Benz GLS CLASS (X166 and X167 generations) uses a direct TPMS system that measures actual tire pressure via sensors inside each wheel. Unlike indirect systems that rely on ABS wheel speed, your GLS CLASS will trigger a warning light the moment a sensor is missing, low on battery, or reading outside the 32–42 PSI range common for this platform. Skipping sensor installation on winter wheels isn’t an option.
Temperature vs. Pressure: The Physics You Can’t Ignore
Every 10°F drop in ambient temperature reduces tire pressure by approximately 1–2 PSI. A GLS CLASS parked overnight in 20°F weather will show 4–6 PSI lower than when filled at 70°F. If you set winter tire pressures at 38 PSI in a warm garage and drive into freezing conditions, the TPMS may trigger a low-pressure warning within minutes. Always adjust pressures to the cold-stamped recommendation on your driver’s door placard after the tires have been outside for at least three hours.
Sensor Fitment for GLS CLASS Winter Wheels
Not all TPMS sensors are interchangeable. The BH-Sens BL-ST-081 (433MHz) is a clamp-in unit that directly replaces the OE sensors found on most 2014–2023 GLS CLASS models. It matches OEM part numbers 36106872774, A0009052102, and A0009054104, among others. Before installing winter wheels, verify that your aftermarket rims accept clamp-in sensors (many budget winter wheels use rubber stems that require separate TPMS valves).
| Sensor Feature | Specification |
|---|---|
| Frequency | 433MHz |
| Type | Clamp-in, pre-programmed |
| Compatible GLS CLASS Years | 2014–2023 (check compatibility by VIN) |
| Battery Life | 5–7 years typical |
| OE Cross-References | 36106872774, A0009052102, A0009054104, 42607WAA02 |
Step-by-Step Winter Tire Swap for Your GLS CLASS
- Disarm the TPMS system – On most GLS CLASS models, the system resets automatically after a few minutes of driving with new sensors. No special tool is required unless you’re replacing a faulty sensor mid-season.
- Install sensors before mounting tires – Clamp-in sensors must be torqued to the wheel manufacturer’s spec (typically 35–45 in-lbs). Over-tightening cracks the sensor housing.
- Program or auto-learn – The BH-Sens BL-ST-081 is pre-programmed to match OE IDs. Your GLS CLASS will auto-detect the sensor IDs after a short drive above 15 mph. If it doesn’t, use a TPMS tool to trigger each sensor in sequence (left front, right front, right rear, left rear).
- Set cold pressure – Fill to the door placard value (usually 35–39 PSI for GLS CLASS). Do not exceed 42 PSI.
Storage Tips for Summer Wheels with TPMS Sensors
- Keep sensors away from extreme heat – Storing wheels near a furnace or in direct sunlight accelerates battery drain. Ideal storage temperature is 50–80°F.
- Protect sensor valves – Use foam wheel bags or a dedicated TPMS storage case to prevent the valve stem from being knocked off during handling.
- Maintain partial pressure – Leave 15–20 PSI in the summer tires to keep the sensor seated and prevent the tire bead from unseating. Do not deflate fully.
- Label wheel positions – Mark each wheel (LF, RF, LR, RR) so you can reinstall them in the same position next season. This avoids the need to re-learn sensor locations.
Recommended Part
For a direct-fit, pre-programmed TPMS sensor that works with your GLS CLASS winter wheels, use the BL-ST-081 | BH-Sens 433MHz TPMS Tire Pressure Sensor | Fits Aston Martin, BMW, Maybach, Mercedes-Benz, Mini & 2 More | OE# 36106872774, 42607WAA02, 5A3DC0401. It’s a clamp-in design that matches OE specs and requires no dealer programming.
FAQ
Can I reuse my existing GLS CLASS TPMS sensors on winter wheels?
Yes, if the sensors are less than 5 years old and the winter rims accept clamp-in sensors. However, swapping sensors between wheel sets risks damaging the valve stem and requires re-programming. It’s more practical to buy a dedicated set for winter wheels.
How do I know if my GLS CLASS uses 433MHz or 315MHz sensors?
Mercedes-Benz GLS CLASS models built for the North American market after 2007 use 315MHz sensors. European and Asian market models use 433MHz. Check your vehicle’s build sheet or the part number on your current sensors. The BH-Sens BL-ST-081 is 433MHz; for 315MHz applications, select the corresponding BH-Sens variant.
Why does my TPMS light stay on after the winter tire swap?
Three common causes: (1) The sensors were not triggered—drive above 15 mph for 5–10 minutes. (2) One or more sensors have dead batteries. (3) The winter wheels have a different valve type that doesn’t match the GLS CLASS TPMS antenna positions. If the light remains on after a 20-minute drive, use a TPMS tool to verify each sensor is transmitting.
Should I add extra pressure in winter for my GLS CLASS?
No. Over-inflating for cold weather reduces traction and increases wear. Stick to the door placard pressure. The TPMS will alert you if pressure drops too low—let the system do its job.