W204 om651 Fluctuating Temperature Gauge

[Tonygw]

Which model did you have? did you have the OM651 engine?
To be fair you have to keep a close eye on the gauge as it drops and rises back up fairly quickly. Mine is fairly steady at 90 but does drop in some cases, but you have to be watching when it does.

 

[Tonygw]

I noticed your location is Miami? is that correct or just a wish? if it is you haven't experienced British weather? That makes a difference..

 

[HWW212]

I noticed your location is Miami? is that correct or just a wish? if it is you haven't experienced British weather? That makes a difference..

A wish ? Being semi retired I've learned where its best to live in the winter months. I have the M273 and, yes, in my case it showed up during winter.