2005 C55 AMG
a week ago showed up the coolant temperature warning. It normally runs up to 90ish degrees and stays there. Everything was working normal before, nice heater, nice a/c, etc. Warning light showed up and while driving it, as kind as I keep moving it won’t go past 95 and depending if I’m moving or not it could go back down to 85. I noticed the cooling fan wasn’t moving. After reading a similar case here I ordered a new fan. A week later I got it and installed it. Coolant temperature warning disappeared but the fan isn’t turning yet. I tested it idling and temp went up to 120 but the fan never kicked in. A/C was working until temperature went above 90 and then started to blow warm air. No messages, no warning lights. I’m clueless. Anybody has any idea and can point me on where and what to look for????