I got a problem from my W126 280se.My radioator overheating.If i no turn on the A/c the temperature is 80-90 in between,but if i turn on the A/c the temperature will go up 100-110.When i driving fast with A/c the temperature will decrease until 80-90,if i idle the temperature will increase until 100-110.I just changed thermostat,clean up the radioator and change new A/c fan.But still the same problem.Anybody help me please!!!

Thank's
Mercw126