1995 - E320
225 K Km. Own for 3 years

Replaced Water pump, tensioner, AC compressor, thermostat, fuel lines and couple of unrelated things around 2010 - 170 K Km.
Normal service schedule, coolant was replaced a year ago.

No issues whatsoever, so far.

Working temp is around 90-95 degrees, closer to a 100 in a traffic, but never over 100, even in 34-37 C(99 F) ambient temp. Ac was not a factor

Right now I do observe a change. Car was parked for 12 days.
Slightly lower temps in the highway speed - around 80-85.
With AC temp is higher and
in the traffic with AC can reach 110.
Pair of Aux fans are kicked in properly on AC on event.

Any ideas? Thanks,
PS> Radiator is still factory original