1992 300se (140) with 126,000 miles on her. The coolant needle is moving slowly from 80 degrees celsius to the 100 degree celsius mark. Very rarely have i seen it go over the 100 degree C mark, but it has done it, but never has overheated. I replaced the thermostat but it still occurrs. Nothing major really, i have owned this car since it had 104,000 (or last year) and it has always happened. I was just wondering if this is normal, or is it a cooling problem ( radiator- water pump- etc.) Any and all advise is greatly appreciated.

Gratzie and Thank You
Mike