I think the 4053 should work on a digital layout. I have older coaches with pre-digital interior lights and they work on my digital layout (ms1). When converting a locomotive to digital is usually when you have to change the lights.



<edit> see Western Pacific's post below. sorry.



I didn't see a lighting kit for 43019 on Marklin web page, but you maybe able to make something fit, like these: https://www.marklin-user...buchse-4313-and4314.aspx . I eventually powered the lights using the locomotive slider and current conducting couplers because the slider on the coaches did not work well: https://www.marklin-user...7030---nice-feature.aspx Some folks who post here have put a relay in their locomotive to power the lights in their coaches.



Good Luck!

The light bulbs for analogue operation (up to 16 V track voltage, varying with the speed) can became too hot on digital layouts (up to 22 V constant track voltage (*)).
No problem for tin-plate coaches, but could do harm to plastic parts (e.g. the transparent plastic bar that distributes the light).

Lights bulbs will have a reduced life-time. So when replacing failed light bulbs, you should go for the "digital" types (22 V).

(*) a 16 V AC transformer will give you a higher track voltage than an 18 V DC power supply

Sorry for the diverging opinion, but I do not think that it is 100% safe to use older lighted coaches on a digital layout. The reason for my concern is that the analog system was designed to operate between 0 and 16VAC with momentary surges of 23V to operate the reverse mechanism of the loks. There is a risk that the constant voltage of 18VAC used in digital layouts will create a situation where the lightbulbs will be brighter, hotter and may cause the plastic light channel inside the coach to melt and deform. I have seen this on a few 26.4-27cm coaches from the 1980's that I tested with my 6021. I would therefore recommend that bulbs with a higher voltage limit be installed in place of the ones delivered with the original lighting kit, so that the light is not so bright and the risk of damage to plastic inside the coach (and to the paint) is reduced.
In plastic coaches, overheating of the illumination can result in melting of spots on the coach body, making the change of bulbs more essential.
It should be possible to replace the original Maerklin lighting with the new LED lighting, attaching the light strips to the roof of the coach using the two sided tape provided. All that you would have to adapt is the contacts on the wires from the slider and to attach the other contact to the coach body (metal coaches) or to a ground contact (Hag also makes a wheel contact with similar mount under the number 519 which can be installed on the other bogie).
For the metal bogies of the 24cm and similar metal coaches, I have found the Hag slider #518 (for the old generation) to be an ideal replacement for the original Maerklin slider. The Hag part attaches to the inside of the pins which allow to bogie panels to move up and down, and also result in the slider having more play and maintaining better contact with the center rail.

518 Mittelschleifer WS für alle Wagen der alten Generation (Frotteur central pour voitures-voyageurs, anc. gén). The price is between 6 and 10 CHF (SFr).

See: http://cgi.ebay.de/HAG-S...fer-Nr-518-/180622238021

Regards

Mike C

To add to my previous answer.

I haven't rum my old tin-plate coaches that much, but would the higher voltage become an issue then I've had an idea to just put a simple full-wave rectifier bridge in each coach having 7077. That means the current would always go through two diodes and that reduces the volatage by approximately 1.4 V. If that would still be too much then I'd add diodes on the DC side. If I add 2 diodes, the total forward voltage drop is 2.8 V, which would take down the 22 V of the digital system to 19.2 V.

For the 7320 I would probably look att converting it to having LEDs instead. An alternative that I've been thinking of is to use LEDs from BRAWA house lighting kits 3401 or just modify the 7320 and solder the metal lampholder parts to it. (This may require a serial resistor or diod bridge and diodes as for the 7077 lamps - I haven't tested this yet).

What I have done is put a current limiting resistor in series with the light bulb in each coach. I guess a higher voltage bulb would have been an easier solution.