You are most welcome - this is what this place is for, sharing information.

The charge warning lamp is a direct path to the alternator, I dont recall how a 129/140 is done up between the cluster and key but in all MB fashion it would be quite similar to other models. e.g. on my car which is a 95 w124 the charge lamp positive (15 in bosch talk) is supplied by a fuse in the fuse box which only gets hot when the key is on.

This charge lamp ground (from the alternator when engine is off and key is on) is also responsible for the warning lamp check, that is why when it illuminates all the warning lamps light up and go out as soon as the lamp goes out. It prevents backwash from other lamps through diodes in the wiring. I think your car would be very similar.

btw the indications that do not get a lamp check test are the high beam and parking brake.

For starters you can check for all fuses to be intact.

__________________
2012 BMW X5 (Beef + Granite suspension model)

1995 E300D - The original humming machine (consumed by Flood 2017)
2000 E320 - The evolution (consumed by flood 2017)