Hi,
I have a 2008 X53.0 sd EU, and in the hidden menu i have coolant temperature at about 70 C, after 1 hour city driving, with outside temperature at about 4 C. If i shut down cabin heating, it raises to about 80 C but drops down to around 70C as soon as i turn on heating.
I replaced the thermostat but it is still the same. Is this normal operating temp values?
I checked with ista, no errors, and the temp in dde menu is tha same as on the hidden menu.

Is there something else i have to check?
Thanks in advance