Bosch may be the manufacturer of the OE part available from MB. I have heard mediocre things about their wires recently though. Bosch also makes a "generic" set of wires that will easily fit the car, but where some of the wires are longer than the stock wires and don't have the outer "sheath" that the factory wires do, to contain/neaten the bundle.

If you decide to purchase aftermarket wires: I have heard only mediocre things about the Bosch wires' quality in recent years, but have heard great things about the Beru wires. I have no direct experience with this, as the two sets of wires I've purchased in the past few years have been the OE MB wires, which are an exact/direct fit.

Cheers,
Gerry