Update: The English name for this product is "Noch Temporary Glue".
Some time ago I did an article on using the motor imitations that come with the point drive from Märklin. It provides a nice little touch and at the same time let's you know that the point is not a manual one.
There is just one problem with these small plastic parts: They fall off. From time to time, and more often than not, they will simply fall off the point when you handle it.
The fix is extremely easy: I use NOCH Hin & Weg-Kleber to attach the motor imitation to the point.
NOCH Hin und Weg-Kleber makes it easy to attach motor imitations temporarily to the C track.
The Hin & Weg-Kleber (NOCH #61120) is a special kind of glue that you can use to attach figures, cars and whatever scenic accents you have on your layout, but do not want to attach permanently.
The glue basically becomes a sticky surface, that you can attach several times. This means that you can move your scenic accents around, or take them off for transport of your layout. This is can be very helpfull if you have a modular layout.
If you cannot find the NOCH Hin & Weg-Kleber, you can use Woodland Scenics Accents Glue (Woodland Scenics #A198), which is the exact same product.
Tip: You can also use the glue to attach passengers in coaches. I do not like the idea of permanently gluing people in my coaches. With the NOCH Hin & Weg-Kleber I do not need to worry about ruining the coach. I can always take the passengers out if I do not like the way it looks.
Update: As mentioned in the comments, the motor imitations are only available when you buy a Märklin point motor. Many people use different point motors (e.g. the Viessmann motor). If you do that, you will not get the accessories mentioned in the article. They are, however, available as spare parts.
The spare part numbers are:
Märklin/Trix C track motor immitation: E521790 (a bag of five)
Märklin/Trix C track manual throw ("Handhebel"): E520980 (a bag of ten)