Finding the Knock sensors.

[BLACKnBLUE]

Where are the knock sensors on the four cylinder diesel engines?? The car is a 2014 W212-R, (AMG Night Edition), 2.1 diesel, (4 cylinder). I‘ve been told there are two on this engine but I can’t seem to find them? Some online videos suggested I needed to remove the entire air intake manifold but they all look like they are working on a V6 engine layout. This one‘s an inline 4. Any help would be gratefully received.

 

[Deleted member 149005]

Do you mean NOX sensors fitted to the exhaust system?

 

[BLACKnBLUE]

Do you mean NOX sensors fitted to the exhaust system?

No, It’s definitely the ‘Knock‘ sensor. I’ve been told there are 2 bolted to the engine block. One between cylinders 1+2 and another between 3+4. I’ve got visions of having to Strip manifolds off or dropping the engine!

 

[Deleted member 149005]

Never heard of knock sensors so I can’t help..

 

[BLACKnBLUE]

Never heard of knock sensors so I can’t help..

Cheers for trying. Knock sensors detect if the fuel is detonating too soon or too late and adjusts for it. The difference causes a Lot of confusion.

 

[ToeKnee]

I thought they only had knock sensors on a petrol engine?