I do understand them. I thought it could be my own paranoia. However, it did blow the cap and all the coolant out last week. My paranoia was confirmed. This prompted me to change out the water pump.

The old water pump seemed ok, temp still goes high on hills, I don't want to test it too much. Any help is appreciated on this. I am stumped.

Hoping the problem is the water pump and the temp sender. I will order the sender tomorrow.

It is noteworthy to mention I use all genuine MB parts