Hi Guys,

I'm in the process of fixing my A/C clicking issue and currently replacing a stepper motor, I have sourced a used replacement (after being quoted $600 from Mercedes) from a wrecking yard. The motor happens to have a different part number to mine, although being sourced from the same model.

I have done a little googling and found they both look exactly the same but I'm a little worried the part I've been sent won't function correctly.

The part I have is A203 820 16 42 (EAB501)
and the replacement is A203 820 12 42 (EAB502)

Does anyone know whether or not these parts are interchangeable, and be able to enlighten me on the differences?

Regards
James