Begin by locating the MAF sensor and housing. It is located on the left side of the engine below the radiator hose, in front of the power steering pump (red arrow). If you are having trouble finding it just follow the intake tube away from the throttle body.
Pull the housing up and out of the car. The sensor is actually protected inside the housing and as with a lot of modern cars you can only get the sensor and housing as one piece. If you are going to try and clean the sensor only use MAF sensor cleaner on it and never touch the actual sensor film with anything.
The MAF sensor is unidirectional and can only fit into the car in one direction. There is also an arrow on the side of the housing (red arrow) showing which direction the air needs to flow. The arrow points towards the throttle body. Installation is the reverse of removal.
Comments: Could you possible give me some advise.
I own a Merc Benz slk r170. I need help diagnosing a problem. The car will not start and if it does it runs so rough, if you press the accelerator pedal it will begrudgingly rev up to about 2500 rpm but take your foot of the accelerator it will start to run rough them cut out. When you rev it there is a smell off unburnt fuel. Any help would be most helpful.
June 16, 2016
Followup from the Pelican Staff: Is the check engine light on? Sounds like an engine misfire. I would check spark, fuel and compression on all cylinders.
- Nick at Pelican Parts
Comments: Did the space where the MAF have an O-ring attached?
May 21, 2015
Followup from the Pelican Staff: The sensor does. The sensor housing fits tightly into the duct. Going by memory. - Nick at Pelican Parts
Comments: I have a 1998 SLK with 120k and have cel with code p1519. I've replaced and checked the cam solenoid and it reads 8ohms, I checked the power to the solenoid wires and it reads 7 volts. I've checked and replaced dry rotted vacuum lines and rubber connectors. The MAS has been cleaned. Cleared the code and it came back after a few drives.
What would be my next step in finding the cause to this code and repair it?
Thanks for your help.
April 30, 2014
Followup from the Pelican Staff: The code is for a camshaft actuator. I would check desired verse actual camshaft position. The actuator or solenoid that control the actuator may be faulty. - Nick at Pelican Parts