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Mercedes A Class 12 - 18 Reset Tyre Monitor / Calibration Info
Reset Tyre Monitor / Calibration Info
How to Reset / Calibrate the Tyre Monitor system for a Mercedes A Class (12 - 18)
The Reset Tyre Monitor / Calibration Info for the Mercedes A Class (12 - 18)
Restart the tyre pressure loss warning system if you have:
1. Changed the tyre pressure.
2. Changed the wheels or tyres.
3. Fitted new wheels or tyres.
Before restarting, make sure that the tyre pressures are set properly on all four tyres for the respective operating conditions. The recommended tyre pressures can be found on the tyre pressure table on the fuel filler flap.
The tyre pressure loss warning system can give reliable warnings only if you have set the correct tyre pressure. If an incorrect tyre pressure is set, this incorrect value will be monitored.
Make sure that the key is in position 2 in the ignition or ignition on.
(1) Press ◄ or ► on the steering wheel to select the Serv. menu.
(2) Press the ▲ or ▼ button to select Tyre pressure.
(3) Press the OK button.
The Run Flat Indicator active Restart with OK message appears on the multifunction display.
If you wish to confirm the restart:
(4) Press the OK button.
The Tyre press. now OK? message appears on the multifunction display.
(5) Press the ▲ or ▼ button to select Yes.
(6) Press the OK button.
The Run Flat Indicator restarted message appears on the multifunction display.
After a teach-in period, the tyre pressure loss warning system will monitor the set tyre pressures of all four tyres.
If you wish to cancel the restart:
Press the OK button.
or
If the Tyre press. now OK? message appears, press the ▲ or ▼ button to select Cancel.
Press the OK button.
The tyre pressure values stored at the last restart will continue to be monitored.
The Reset Tyre Monitor / Calibration Info for the Mercedes A Class (12 - 18)
Restarting the tyre pressure loss warning system
Restart the tyre pressure loss warning system if you have:
1. Changed the tyre pressure.
2. Changed the wheels or tyres.
3. Fitted new wheels or tyres.
Before restarting, make sure that the tyre pressures are set properly on all four tyres for the respective operating conditions. The recommended tyre pressures can be found on the tyre pressure table on the fuel filler flap.
The tyre pressure loss warning system can give reliable warnings only if you have set the correct tyre pressure. If an incorrect tyre pressure is set, this incorrect value will be monitored.
Make sure that the key is in position 2 in the ignition or ignition on.
(1) Press ◄ or ► on the steering wheel to select the Serv. menu.
(2) Press the ▲ or ▼ button to select Tyre pressure.
(3) Press the OK button.
The Run Flat Indicator active Restart with OK message appears on the multifunction display.
If you wish to confirm the restart:
(4) Press the OK button.
The Tyre press. now OK? message appears on the multifunction display.
(5) Press the ▲ or ▼ button to select Yes.
(6) Press the OK button.
The Run Flat Indicator restarted message appears on the multifunction display.
After a teach-in period, the tyre pressure loss warning system will monitor the set tyre pressures of all four tyres.
If you wish to cancel the restart:
Press the OK button.
or
If the Tyre press. now OK? message appears, press the ▲ or ▼ button to select Cancel.
Press the OK button.
The tyre pressure values stored at the last restart will continue to be monitored.
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Tyre Pressure Monitoring Systems Explained
There are two common types of tyre pressure monitoring systems, one has a sensor on the inside of the wheel connected to the valve, the other is integrated into the ABS system.
(1) The transponder connected to the back of the valve sends a signal to the car computer with the current tyre pressure of that wheel.
Unlike the early renault system where it had a different coloured ring on each valve which defined the position the wheel / sensors had to be located on the vehicle, modern systems now have a wheel / sensor detection mode, this mode is activated within the first few miles of your journey and tells the vehicle which sensor is at which postion. This means you can move the wheels from front to back (if the tyre sizes are the same) without any reprograming of the sensors.
The benefits of this system is that it can tell you a tyre is flat before you move the vehicle and most vehicles can show a live tyre pressure on the vehicles dashboard. The system doesnt need to be reset when the wheels are move postion, new tyres are fitted or the pressure are altered.
The disadvantage of this system is sensor can go wrong or be damaged when new tyres are fitted if the proper care is not taken.
(2) The ABS system works by counting how many revolutions the wheel does at a certain speed and puts the light on if there is a variation to the stored reading. The variation would be caused by the tyre being deflated meaning the curcumferance would be smaller making the wheel turn faster.
The benefit of this system is that you can put different wheels on the vehilce with new sensor or reprograming (just reset the system)
The disadvantage of this system is that it cant detect a flat tyre till the vehicle is moving. The dashboard will not display current tyre pressures. This system can suffer from false positives, triggering the warning light when all pressures are correct. The system has to be reset when the wheels are move postion, new tyres are fitted or the pressure are altered.
(1) The transponder connected to the back of the valve sends a signal to the car computer with the current tyre pressure of that wheel.
Unlike the early renault system where it had a different coloured ring on each valve which defined the position the wheel / sensors had to be located on the vehicle, modern systems now have a wheel / sensor detection mode, this mode is activated within the first few miles of your journey and tells the vehicle which sensor is at which postion. This means you can move the wheels from front to back (if the tyre sizes are the same) without any reprograming of the sensors.
The benefits of this system is that it can tell you a tyre is flat before you move the vehicle and most vehicles can show a live tyre pressure on the vehicles dashboard. The system doesnt need to be reset when the wheels are move postion, new tyres are fitted or the pressure are altered.
The disadvantage of this system is sensor can go wrong or be damaged when new tyres are fitted if the proper care is not taken.
(2) The ABS system works by counting how many revolutions the wheel does at a certain speed and puts the light on if there is a variation to the stored reading. The variation would be caused by the tyre being deflated meaning the curcumferance would be smaller making the wheel turn faster.
The benefit of this system is that you can put different wheels on the vehilce with new sensor or reprograming (just reset the system)
The disadvantage of this system is that it cant detect a flat tyre till the vehicle is moving. The dashboard will not display current tyre pressures. This system can suffer from false positives, triggering the warning light when all pressures are correct. The system has to be reset when the wheels are move postion, new tyres are fitted or the pressure are altered.