Joel,

As long as the system is heating and cooling properly, and the engine is maintaining proper cooling temperature, I wouldn't worry about it too much. However, I would want to know that the cooling system is filled and working properly.

I leave the Climate Control on all the time, and just set the temperature where I want it and forget it. There's really no need to turn the unit on and off.

Good Luck,
Larry

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Larry Bible
'84 Euro 240D, 516K miles
'88 300E 5 Speed
Over 800,000 miles in
Mercedes automobiles