OK, so the details are still not all in one place.

1. M104 - has 2 variants. CIS-E and HFM injection.
2. Flywheels differ for these models, regardless. One has the chopper ring for hall sensor, the other has missing tooth ring for VR sensor. Both of these flexplates are for automatic transmissions.

3.CIS-E Manual M104 engines used dual mass flywheel.
104 030 12 05 – dual mass flywheel, LUK 415 0023 11

4. Dual mass clutch is different:
124 250 02 01 – clutch kit, LUK 623 1668 00

5. Flywheel bolts: 6 x N007984 008003

6. Flywheel Bolt washers: 6 x N912004 008102

7. Pilot bearing: LuK 410 0109 10 or Sachs 1863 869 031

Now, for the 716.6xx series gearboxes, they will bolt up. same bellhousing pattern for m102/3/4, m111.

Input shaft length - Not Known (exactly) with reference to bellhousing flange (gearbox mating face).

What is known: m111 engines used dual mass flywheel.

What is unknown:

Dimensions of flywheel (from crankshaft flange to clutch face , pilot bearing location, diameter (less important)

716.6XX throwout bearing travel (measured).
Can adapt aftermarket (tilton) concentric bearing with appropriate spacers also?

8. Shifter - from the SLK A1712670124 in lieu of the rod & cable mechanism.

9. Propeller shaft front section length (will be longer) - does it match to a currently available existing MB part, or will it need to be fabricated.


For CIS-E m104, flywheel will likely need to be custom. Automatic flexplate can be used for chopper ring and starter ring gear. Flywheel centre will need to be fabricated to match appropriate pressure plate and clutch.

Throwout bearing may require to be customized - either spacers or aftermarket toroidal bearing etc.

If the idea is to use off-the-shelf MB parts, more information about the flywheel dimensions is required.

If the dual-mass flywheel is a bolt-in swap, with clutch and pressure plate, then a lot of the unknown can be taken out of the equation instantly, as these parts are readily available and can be measured. From there, if a single mass flywheel is desired, the dimensions can be replicated as required, positioning the pilot bearing, and throwout bearings in the correct position for proper operation.

Alternatively, there may already be an off-the-shelf solution already available - if in limited supply (m103 single mass flywheel for CIS-E?)

Does anyone have the missing information above???

input shaft length - relative to gearbox bellhousing flange
flywheel depth of dual mass flywheel - crank to clutch face.
pilot bearing location for m111 - where the gearbox originally came from - with reference to crank and bellhousing flange

Armed with this information, a swap for an auto in an older m103/4 will be easier.

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