For the 560SL, the cable lengths, Thats the raw cable without boot is as follows.

1 780mm
2 740mm
3 830mm
4 900mm
5 660mm
6 740mm
7 740mm
8 740mm

They are both M117 engines. As long as the fireing order is the same your relative lengths should be the same.

Also my friend bought a set of Bosch wires for his 560SL and they came numbered. ???

John Roncallo