My father in law has a E220 (1995 model). The vehicle used to operate at 80C until the water pump started leaking. Since replacing the pump the temperature peaks at 92C+.Subsequently he replaced the thermostat as well which has made no difference. When driving in traffic the temp fluctuates rapidly. We were told this is normal but I am not convinced, as the previous temperature was much lower than this and stable.We've had the pump rechecked but it seems to be working fine. Please help me establish what the correct specified operating temperature is and why his vehicle ran at a lower temp before replacing the pump?

Thanks from sunny South Africa.....