I don't have a manual, but I can comment on the maintenance and wear based on experiences with a large number of Marklin, Huebner and Maxi G1 locos Some of the very early Maxi locos that had metal (brass) driving gears failed very early if they did not get lubrication fro0m thje start. All later models have the tough nylon gears and can take good loads and heavy use if they are lubed every 30--40 hours of running. The manuals are inconsistent with Marklin G1 models on lubing instructions. I suggest LGB gear grease for all gears and only Marklin standard lub oil (same as HO) for all bearings) USE SPARINGLY. Check often if running outside or pulling heavy loads - more than 12 wagons. If wear happens, check the Marklin Web Site - I have found that all gears that wear out in any model are available still, and are very cheap and easy to replace. Sometimes the older models are listed with later models so check a number of loco numbers in that same family to identify the part. Especially keep the first idler gear well lubed with oil on its very thin side thrust washers and its shaft bearing if you plan on pulling heavy leads. Otherwise go for it and relax - they can take way more than you originally think. Peter

What conserns me is that all paperwork considdered My model (the 5516) should run on dc ac and digital. From the switches on the bottom one is for pentographs and a 3 position switch, wich is disabled. How do you operate yours?
I have a 6021, but it will not work right. It does move in AC, but thats it.
The manual is nice but minimal.