idlemarvel
Neither idle nor a marvel
If you need sound for your German/Austrian diesels this is a very cheap solution. Sound module, speaker, volume control for £65 + £5 P&P. Works with DC and DCC. These are more than twice this RRP. I have no connection with the seller. My warning would be not "new" but boxed and unused so untested, and has been in long term storage.
LGB ref 65002 European diesel sound unit. Boxed, G scale, unused | eBay
Manufacturer details here: European Diesel Sound Module | Märklin
LGB ref 65002 European diesel sound unit. Boxed, G scale, unused | eBay
Manufacturer details here: European Diesel Sound Module | Märklin