Blaupunkt did at least two units that have aux in.  One is the Reno and the
other is the Aspen.

They offer IR remote control and lots of interesting features.  The Reno is
not dolby but the Aspen is.

They are Cassette tuners with aux and cd changer capability.

The setup that I like is the nomad Jukebox.  Managed from your PC to load
mp3s in a structured fashion using playlists, the JB can search by album,
author, genre to select the songs in the loaded set to play.  The simple one
with 6GB holds lots of music.

Both the Reno and the Aspen are older models that fit well ergonomically
with the dash.

Lookem up on the blaupunkt website under old M3 and M5 series.

Ebay has em occasionally for around 125$ generally including the cd changer.

pensioner