You have the PDFs and the updated MP3s. Now what? Most users give up because they don't use the materials correctly. Here is a for this classic course:
If you are looking for more "up-to-date" (UPD) listening materials that follow a similar comprehensive approach, these free resources are frequently recommended: My review of the resources I've been using to learn German curso aleman planeta agostini pdf listening upd
The course was designed for Spanish speakers (the instructions are in Spanish), but the German content progresses from absolute beginner (A1) to intermediate (B1/B2). Today, many learners search for digital versions—hence the popularity of the and accompanying "listening upd" (updated listening files). You have the PDFs and the updated MP3s