The Bosch original point set has been discontinued by Mercedes and Bosch. The units being delivered are Bosch but do not have the adjusting concentric. Same function just a little more difficult to adjust than the originals. In addition you probably want to consider purchasing a condensor to replace at the same time as the points. An alternative to the regular maintenance and replacement of the points and condensor is the maintenance free Pertronix Ignitor electronic points system.
The stock setting for the contact points is .4mm or (.016" for those without a metric feeler gauge) These are rapidly becoming rare as Bosch has discontinued manufacture, and MB shows no more stock.
0001580890 has been replaced by 0001580790
Bosch Part Number: 1-237-013-007