At 8 bar it should be working. Does it get cold if the engine is cold? I have seen these that have a blend air flap stuck in the heating position so the cold air gets heated back up.
It could be the cooling on the charge air cooler. The pump is behind the bumper and is known to fail at times. You could try powering it from a fused external supply to see if it runs.
The main fan should come on if the air conditioning is on.
My 203 did it last week I knew it was bearing because the light came on at roundabouts. Because its esp it reacts to minor things like one wheel speed sensor variation from normal.
These sensors are active not like the old moving magnet ones that only drop out if the gap is huge.
I think the mileage is not displayed because the cluster is not paired or interlocked to the other control units that store chassis numbers and mileages.
I also would be surprised if this can easily be recoded.
I think if you are lucky you might be able to get it reset by one of these aces that...
My point is that true AGM Batteries are deep cycle batteries designed to be charged and recharged when flat not to be kept topped up.
And that they are much more expensive than other battery types more suitable for use in vehicles.
Charging on these cars is controlled by the cdi or ptcu usually with a lin signal.
Some now are smart charged to save fuel and emissions using the values from the battery sensor.
So a better way to check charging is with a current clamp.
Looking at the voltage on the top of the star is not a...
For what its worth I think it is the same battery.
If it states vrla/agm it is not a true agm battery.
Advanced glass mat. Batteries are comparitively much more expensive than valve regulated lead acid ones.
AGM batteries are more for caravan boat leisure.
They can take a lifetime to charge to...
If the belt is also squealing then I suggest replacing the belt along with the tensioner and whilst it is off checking the rest of the pulleys for correct alignment and bearing wear.
Whilst the engine is idling look at the belt it should remain central on the pulleys.
There is a PTC heater in the cabin heater this also can have an effect on engine idle speed so it could be a normal function. The accelerator pedal contacts could be dirty giving this fault code. But I don't think this would affect the idle speed
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