I didn't know that the TD and D W123 rear belts were different. The middle and rear seatbelts in the TD are very close and the center one can be modified by grinding the mounting plate that bolts to the floor pan and it will work. It should also work vice-versa. Ask me how I know about this.

From playing aroung with these belts, I can also have the entire rear end of a W123 wagon apart in about 30 mins.

The detent that is inside the seatbelt only works if the belt is at exactly the correct angle. If it is not, it will not pull out of the real. On the W123 wagon, the middle and rear seats share the same angle and housing as each other.

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Doug

1987 300TD x 3
2005 E320CDI