Stick with your current transmission and just do the b3 bands. Go to another shop as mb doc said. No adjustments. The transmission must be removed.

A used transmission is a major gamble. One that in the long run may cost you more.

More info here:
http://www.w124-zone.com/articles.php?article_id=21

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2016 Monsoon Gray Audi Allroad - 21k
2008 Black Mercedes E350 4Matic Sport - 131k
2014 Jeep Wranger Unlimited Sahara - 62k
2003 Gray Mercedes ML350 - 122k