If you have had a warning and added air you have to reset the monitor. With the pressure displayed press the steering wheel button and if it asks if the pressures are now OK select Yes.

But if it keeps happening and one tyre is always down that wheel/tyre has a leak. If it keeps happening and the pressures re always good then it's a problem with the monitoring system.

 

Does anyone know where can I find perfect tyre pressure level for my Mercedes A class. I’ve bought this A class 16 model and keep on getting low tyre pressure notifications

See inside your fuel flap

 

I checked inside fuel cap and there is 300 KPA written on it. Rest is in German. I was worried if 300 KPA is too much air pressure.

 

300kpa is 45psi which sounds a lot. My flap has psi in smaller print and MM shows them as 35 and 30.

 

It all depends what size tyres you are running, and what load you are carrying, also which model/variant of A-Class.

If you are running XL tyres with a full car load then 300 kPa is not unusual.

Post a photo of the inside of your fuel flap here.

 

Eg on this particular W177 A-Class
If you have 19 inch wheels and have a full load in the car, the front tyre recommended pressure is 310 kPa.

(320 kPa if you’re running M&S tyres )

(Photo taken from this thread)

https://www.aclassclub.co.uk/threads/help-help-tyre-pressures-on-the-19-inch-standard-alloys.19850/post-182477

Post the label for your car on here.

 

 

Cold tyres 300 kPa (43.5 psi) Front and Rear

If measuring hot tyres then 330 kPa Front and Rear


When you have inflated your tyres to the recommended pressures, you have to reset your TPMS so that it registers those new values.

 

43 or 44psi then, when cold, plus 4/5 psi if hot. Doesn't seem to be any variation for loading.

 

Thank you all for your replies and help.

 

On mine, 2.6-2.3 is recommended. In winter I drive with 2.8-2.5, in summer 2.7-2.4. Drive on 225/45 R18.

Why do you have baby tires on the car 😜😅

 

I would check you don’t have a puncture. This always ended up being the cause in all my MBs.