CLK 320 temp gauge

[16vWestie]

Now had my CLK 320 for 3 weeks now and really happy with it. On a long drive yesterday noticed that the temp gauge slowly oscillates from 82 - 88 degrees. This is obviously the thermostat opening and closing but have never noticed on my other cars and thought that the thermostat "settles" into a position to regulate the temp for a given load. Am I correct and have a dodgy thermostat or is this normal MB behaviour

Thanks

 

[Myros]

I've noticed

that the slightest prolonged incline gives a little boost, and the slightest prolonged dip gives a little drop. Was the road you drove undulating in a gentle way?

 

[television]

the gauges are normally quite steady, could be faulty transmitter, don't worry too much at this stage, the opening and closing of the thermostat is not that fast.

Malcolm

 

[16vWestie]

this was on a level motorwat and the needle took about 5 minutes to go from 82 - 88 and back again

 

[Myros]

mine only gets that high

after about 15-20 mins of stationary traffic. When it's rolling along, it never goes above 85 ish uphill, and does drop to about 75 going downhill. That's a three-mile long steep hill on the M62 that I drive over a lot.
As Malcolm said, probably not a lot to worry about.