Timing

Hi and thanks for using 2carpros.

I am not sure what you are looking for. Ignition timing is controlled by the computer. So, I assume you are referring to the timing belt.

Here are the directions for removal and replacement. All attached pictures correlate with these directions.
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TIMING BELT REMOVAL AND INSTALLATION
Camshaft drive, to remove

1. Drape wing protectors over the wings and raise the car.
2. Remove the lower spoiler sections.
3. Insert two Wedges, part no. 83 95 238, between the oil sump and subframe and between the gearbox and subframe.
4. Lower the car.
5. Remove the mass air flow sensor with hose.
6. Detach the power steering hose from the holder.
7. Remove the right-hand engine attachment with bracket and engine mount.
8. Undo the retaining bolts from the coolant pump pulley and power steering pump pulley.
9. Release the multigroove belt from tension.
10. Remove the coolant pump pulley and power steering pump pulley.
11. Remove the belt tensioner and generator air intake.
12. Remove the timing cover.
13. Remove the crankshaft pulley.
14. Zero the engine. The markings on the camshaft sprockets and the timing cover must be aligned, use Installation tool for camshaft scrod KM-800-20, as must the crankshaft marking. Fit the locking tool KM-800-1 and KM-800-2 for the camshaft sprockets and locking tool KM-800-10 for the crankshaft.
15. Undo the tensioning pulley and adjusting rollers. Use tool 83 94 983 as a counterstay on the adjusting rollers.
16. Mark the direction of rotation on the belt. The belt can also be marked with the respective camshaft markings and crankshaft marking to facilitate refitting. Remove tool KM-800-10 from the crankshaft. Let locking tools KM-800-1 and KM-800-2 remain. Remove the lower adjusting roller. Ensure the washer behind the roller is also removed. Remove the timing belt.

Camshaft drive, to fit
1. Put on the camshaft belt according to the markings on the belt and the marked direction of rotation Use Installation tool for camshaft scrod KM-800-30 to keep the belt in place. Fit the lower tensioning pulley loosely. Make sure the washer is in place. Adjust the tensioning pulley by hand so that the belt does not jump. Adjust anti-clockwise. Make sure the markings on the camshaft belt and the corresponding markings on the camshaft sprocket and crankshaft are aligned. Remove the tool KM-800-30.
Fit locking tool KM-800-10, position a piece of camshaft belt and fit Belt tension meter part no. 83 93 985 to measure the belt tension.
Tighten the center bolts of the adjuster rollers lightly. Adjust the lower adjuster roller anticlockwise until a tension of 275 - 300 Nm is obtained. Use tool 83 94 983. Tighten the adjuster roller's bolt. Use tool 83 94 983 as a counterstay. Check the belt tension again and adjust as necessary.
Tightening torque: 40 Nm (39 ft. Lbs.)
Remove the belt-tension meter and piece of the toothed belt.

IMPORTANT: Adjustment of belt tension is only a preparatory measure and must not be used as a check when the belt is finally adjusted.
2. Ensure the adjusting nut on the upper adjusting roller rotates freely and is not tight. Adjust the tensioning pulley with a 5 mmAllen key until the two lines on the tensioning pulley correspond with each other. Tighten!
Tightening torque: 20 Nm (15 ft. Lbs.)
Remove the locking tool for camshaft sprockets 1 and 2. Fit tool KM-800-20. Then, adjust the upper adjusting roller anticlockwise with tool 83 94 983 until the markings on the camshaft sprocket are aligned with the corresponding markings on KM-800-20. Tighten. Use tool 83 94 983 as a counterstay.
Tightening torque: 40 Nm (39 ft. Lbs.)
Remove KM-800-20 and the other locking tools.
3. Rotate the engine two revolutions in the direction of rotation until just before the zero mark and fit locking tool KM-800-10 on the crankshaft. Carefully rotate the crankshaft in the direction of rotation of the engine until the arm is lying against the coolant pump and tighten it. Fit tool KM-800-20 and ensure the markings on the camshaft sprocket are opposite the markings on the tool and that the edge of the belt is aligned with the edge of the sprocket.

IMPORTANT: Check that marking A is about 2 mm above marking B. If this distance is smaller, adjustment must be carried out afresh.
4. Fit the crankshaft pulley.
Tightening torque: 20 Nm (15 ft. Lbs.)
5. Fit the timing cover.
Tightening torque: 8 Nm (6 ft. Lbs.)
6. Fit the belt tensioner and the generator air intake.
7. Fit the coolant pump pulley and the power steering pump pulley. Use Loctite, part No. 74 98 292. Do not tighten the bolts.
8. Fit the multigroove belt.
9. Tighten the retaining bolts on the pulleys.
Tightening torque:
Belt pulley/coolant pump: 8 Nm (6 ft. Lbs.)
Belt pulley/power steering pump: 20 Nm (15 ft. Lbs.)
10. Fit the right-hand engine attachment with bracket and engine mount.
Tightening torque: To body 63 Nm (46.5 ft. Lbs.)
11. Fit the power steering hose in the holder
12. Fit the mass air flow sensor with hose.
13. Raise the car.
14. Lower the engine by carefully removing the wedges.
15. Fit the lower spoiler sections.
16. Lower the car and remove the wing protectors.

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I hope this is what you were looking for. If I am wrong, let me know.

Take care,
Joe