Checking, adjusting clearance of camshaft position sensor/camshaft sprocket segment - AR15.12-P-2143-01A

WARNING: This page does not describe the selected car, but rather 42 other vehicles, including the 1999 Mercedes-Benz S600, 1999 Mercedes-Benz S500, 1999 Mercedes-Benz S420, 1999 Mercedes-Benz S320, and 1999 Mercedes-Benz CL600. However, it is still accessible from the selected car via links, so may be relevant.

Adjusting

Position crankshaft to 25° CKA before ignition TDC of cylinder 1.
Measuring
Use a depth slide gauge to measure size "A" from the plane face of the camshaft position sensor (L5/1) at the cylinder head to the segment (arrow) on the camshaft sprocket.
Enter size "A" in table (see calculation example).

Fig 1: Identifying Camshaft Position Sensor Segment On Camshaft Sprocket
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Use depth slide gauge to measure size "B" at camshaft position sensor (L5/1) without shim from the contact surface to the position sensor.
Enter size "B" in table (see calculation example).
Calculate difference "D". D is the difference between A and B (D = A - B).
Specification "W" is 0.4 -0.6 mm (aim for average of 0.5 mm).

Calculate thickness of shims "S" (S = W - D).

If the result for "D" is a negative value, the amount of "D" must be added to the specified value (0.5 mm) (S = W - (-D) = W + D). Otherwise, the camshaft position sensor would be damaged because of its projection.

Shims (10) are available as replacement parts in 1/10 graduations from 0.1 - 1.0 mm.

Fig 2: Measuring Size Camshaft Position Sensor Size

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

CALCULATION EXAMPLES

	Example 1 Size "A" ≥ Size "B"	Example 2 Size "A" < Size "B"
Size "A"	24.1 mm	23.8 mm
Size "B"	- 23.8 mm	- 24.1 mm
Difference "D"	0.3 mm	- 0.3 mm
Specification "W"	0.5 mm	0.5 mm
Difference "D"	- 0.3 mm	+ 0.3 mm
Thickness of shim "S"	0.2 mm	0.8 mm