You should get the 126 CD-Rom. Most of the car will be the same as the CD (which is basically for US cars). If you have hydraulic suspension get the 116 chassis CD as the 6.9 suspension is the same. Wiring and A/C control will be a problem especially if you have a stripped model (US cars got all the options and only automatic air). I have a book on euro cars wiring and it s**ks. It is like all the old diagrams where all systems are placed on one page.
My best source for european models is on Bosch microfilm which is hard to view at a distance.
Bosch Master, ASE Master, L1
33 years MB technician