hi i have a 2007 c200cdi estate auto and have a problem that when warm the car has idle problems it reves up slightly and when driving when moving

[johnconfused]

hi i have a 2007 c200cdi estate auto and have a problem that when warm the car has idle problems it reves up slightly and when driving when moving it surges

 

[johnconfused]

code reader give code p0112 intake air temperature sensor 1 circuit low what does it mean any help