This is not a difficult job. I can do it in the time that MBDOC mentioned.

Is the motor bad or only the regulator? If regulator, some have spliced a W140 regulator (it's sold separately) as a retrofit. Searching (W210 reg.) will yield applicable threads.

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Terry Allison
N. Calif. & Boca Chica, Panama

09' E320 Bluetec 77k (USA)
09' Hyundai Santa Fe Diesel 48k (S.A.)