I assume you mean the normal water temp gauge? This works fine and read accurately.
I agree it appears to be a problem when cold but still feel there a switch that isn't functioning as today when cranking the engine and not starting I let go of the key and it continued to crank and start, like a switch has been activated?
Hi and thanks for your reply.
I was a Formula 1 engineer , I understand race cars but not much of road cars. Partly due to lack of time and partly due to not having the electronic diagnostic equipment. right now your saying, well chuck it into the local Merc dealer, let him sort it? But I'm the sort of guy who needs to understand whats going on and this is frustrating. For me the problem is like a switch does not activate (maybe extra fuel to start) but I don't think so as the car initially starts but won't be caught (like its burnt the residual diesel left)? The other day I tried to start it and churned over for ages, when I let go of the key, it continued to turn over and start> Like a switch had been turned? OR fuel had not reached pressure?
Thanks for your input