I've been experiencing problems in my 01 c240
1) radiator fan doesnt spin when temperature is at boiling point and causes over heat
2) car hard to start
3) engine vibration all of a sudden and goes away
4) when making a turn or just going straight the car loss power and back in
Power again
5) sometimes car goes off

Recently replaced parts
1) engine coolant temp sensor.. since i disconnected the socket the fan turns double the speed so ruling out the fan ... but when i replaced the sensor the fan kicks in at almost 100 in temp guage in dash but the fan kicks in very slow

Hope someone can explain remedies

 

Hello and welcome to the forum! Have you tried pulling the codes? Has the CEL come on during any period?