[Jam Unar]

any one plz help me with this issue bcoz in my country Mercedes SSS is a slaughter house

 

[jwight]

Welcome to SCoA! If you can have the car scanned for OBD codes that would help. Assuming the radiator fan is working (and your 2007 is a 451 model smart) there are two things controlling fan operation:
The fan relay at the bottom of the SAM (could look like either of these):

or the coolant temperature sensor located on the engine block:

1	Bracket
2	Electrical connector
3	Cylinder head
B11/4	Coolant temperature sensor
Y32	Secondary air injection pump switchover valve