How to Replace a Crank Sensor on a 2001 SLK 320

Removal
1. Engage the parking brake and open the hood. Remove the plastic engine paneling by lifting up on it until it pops loose.
2. Pull the intake tube out of the air cleaner box, and then remove the intake tube from the throttle body outlet by gently pulling on it. Pull the air cleaner housing off of the cylinder head cover and then remove the entire air cleaner assembly from the engine bay.
3. Locate the crankshaft position sensor on the back side of the engine block, next to the transmission bell housing, between the firewall and the left cylinder head. The sensor is black and has a single black wire connector attached to it.
4. Disconnect the sensor’s electrical connector and remove the bolt holding the sensor to the engine block. Pull the sensor out of the engine block. If it stubborn, carefully remove it using a slip-joint pliers, moving slowly to ensure that the sensor doesn’t break off inside the block.
Installation
5. Grease the sensor with a small amount of clean engine oil and insert it into the block until it’s fully-seated. Reinstall the sensor’s retaining bolt and tighten it to 71-inch pounds with a torque wrench.
6. Reconnect the crank sensor’s electrical connector.
7. Set the air cleaner assembly into position and press it down on top of the cylinder head cover until it snaps into place. Reconnect the air cleaner tube to the air box and the throttle body air housing.
8. Place the plastic engine paneling in position on top of the engine and press down on it until it locks in place. Plug the Mercedes-Benz Star Diagnosis scan tool into the vehicle’s communication port and run the CKP re-sync procedure.