As was mentioned above , it appears Bosch long longer makes plug wire sets. A quick internet search reveals that Beru plug wire sets are still available for around $85. I would not hesitate to use Beru products. I also found that the individual parts are still available but are not a good option money wise. The resistor ends list for$22.50 each and the bulk wire is $20 a meter.

If you still have the original wire set you may could repair them but if you need more than 4 resistor ends it would be cheaper to buy a complete set of Beru wires.

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Mercedes Benz Master Tech - Retired