Most modern vehicles now come equipped with a sophisticated tire pressure monitoring system (TPMS) including Mercedes Benz, BMW, Jaguar, VW etc. This system checks the pressure in each of the four tyres of vehicle in real-time and indicates any problem on the dashboard.
There are several advantages of driving with properly inflated tyres and this is why Mercedes TPMS system is such a popular feature in their lineup of cars, SUVs and vans.
- Safer driving- under or over inflated tires makes the braking and handling dangerous
- Less tire wear – properly inflated tires last longer than the ones with incorrect pressures and do not tear or wear easily.
- Better fuel economy – when tires are running at the right pressure, you save on your extra fuel burn
- Road noise and comfort- reduced road noise and maximum comfort is achieved with optimal tire pressure.
If not supplied at a factory level for your model of the car, TPMS can be installed manually directly or indirectly in the older car models with the help of a mechanic.
How does TPMS work?
TPM system is a great addition in cars to enhance the safety levels and to take immediate action in case of situations caused by under-inflated tires. When the air pressure in any of the tyres drops below the manufacturer’s recommended pressure level, tyre pressure monitoring system triggers a warning message on the dashboard and illuminates a warning light to check the tyres for their required levels of pressure. Typically, a driver should receive this warning when the pressure is 25% below than the recommended level.
Once the message is received, you are required to check the pressure in all the tyres using pressure gauge and inflate the tyres to the required pressure if any one of them is found deflated. If the pressure in all four tires is found correct then TPMS message needs to be cleared.
What is Rectify TPMS warning message?
If you see the dreaded yellow warning light on your dash board, it means there is a loss of pressure in any or all of the tyres of your Mercedes benz that needs to be re-inflated to avoid any further potential damage to the car.
First of all, you should stop and place the car at a safe location and manually inspect for the deflation in all or the detected tyres. If the tyre is not deflating rapidly and the tires are not much damaged then continue your drive to the nearest gas station or a service garage to check pressure and fill the air in tyres to match each other. You will need to test it manually, with a hand-held pressure gauge, and fill or let out air as needed.
The most common warning messages on the Mercedes-Benzes cars
Mercedes-Benz shows many kinds of error and warning messages. Some of the most common warning messages on the Mercedes-Benzes cars related to Tyre Tire Pressure are these:
- Rectify Tyre Pressure
- Please correct Tire Pressure
Possible causes of TPMS fault
As with all automotive systems, TPMS can also suffer from issue as it gets older. However, there are a certain situations when you may experience malfunctioning in the TPMS and need to pay attention.
Troubleshooting
Following indications are to watch for; to ensure proper function of your TPMS system.
Dash light comes on:
If you get an indication on your dashboard that one or more of your tire pressures are incorrect, it is always a good idea to check it with a manual gauge and adjust the air pressure as needed. You may need to clear the TPMS message/light. (Procedure of clearing message is detailed below)
Dash light stays on:
If your dashboard tire pressure indicator light comes on and stays on for a certain time, even when you’ve adjusted the tire pressure, which means either a serious damage has happened to the tyre or TPMS sensor might be faulty. In some instances, car may be overridden on the sharp things or any debris found on the road or sometimes if the car is left outside for a longer time weather changes can also affect the sensors of your car since they are located outside the car and any change in temperature (from hot to cold) may trigger this warning message. You can fix this error by blowing in more air into the deflated tyre and resetting TPMS sensor.
Dash lights switch on and off intermittently:
One of your sensors likely has a connection problem or issue reading the tire pressure accurately. Try removing some air and refilling your tire to the correct level. This can sometimes ‘unblock’ the TPMS sensor in the wheel and fix the problem.
How to Reset Your Mercedes TPMS warning Light?
Once you have corrected the tire pressure in your Mercedes vehicle, or repairs have been made to faulty sensors, the dash light needs to be reset.
In general, you need to access the tire pressure settings in your onboard computer:
- Turn the ignition on
- Use the steering wheel control buttons to scroll through the menu to ‘Service.’
- Scroll through and select the ‘Tire Pressure’ menu
- All tire pressures will be displayed (you can verify recommended settings on a label in the fuel door)
- Now that you’ve checked you tires, you can verify that everything is good to go by going back to the “Tire Pressure” menu item display on the dashboard to check. Sometimes the system might display a message saying“tire pressures will display after a few minutes”. If that happens, just drive for a short distance and check again.
- If everything looks good, press the down arrow on your steering wheel to restart the TPMS.
- Press “OK”, and now your TMPS is reset with the new tire pressure values, and the warning light will turn off.
This warning message is very common and appears on many different mercedes-benz cars such as A class W176 W177 Hatchback V177 Saloon Sedan B W246 W247 CLA W177 C177 Coupe X177 Shooting Brake C class W204 S204 C204 W205 S205 Estate C205 A205 Convertible Cabriolet W212 S212 A207 C207 W213 S213 C238 A238 GLA X156 ML W166 GLE C292 GLC C253 X253 GL X164 SUV GLS X166 CLS W257 C257 W222 A217 C217 and many other models.
If you are unable to clear the TPMS light or have a tire pressure problem you can’t solve, you can take your car to the mechanic or a service garage to solve this issue.
