Hi Ian,
I've got a V230 auto and when i sit in traffic the needle on the temp gauge used to go up to 110 befor the fan would kick in. As a result i spent over £500 trying to solve the problem only to be told that the V Class series often run hot, and it's quite common for the fan to only kick in when the needle is nearly touching the red............
Vehicle: 111 cdi vito compact. and C 270 cdi SLK320
Location: Ryton on Dunsmore Nr coventry
Posts: 279
Yes, just in the red, then pumps the water out!
It has not done it again, but i have found the fan is working, it starts slowly and speeds up.
It is about 90 deg normal.
Cannot see why it overheated.
What it did do the next day was, a spark plug came loose! must have been expantion.