James,

I do not believe the parts are the same. On my W124 the modules are located in a box the size of a car battery between the two firewalls.
On a W126, I think they would also be between the firewalls, but not in a box. They could also be under the passenger footrest panel - but I am not sure of either location.

-Larry

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It is a truism that almost any sect, cult, or religion will legislate its creed into law if it acquires the political power to do so. Robert A. Heinlein


09 Jetta TDI
1985 300D