I used Blaupunkt in two of my 164's and they were great. Can't remember the model names but they were around $100 each on discontinued closeout. Got the 1.5 din adapters and they were good to go. My current 164 has an Aiwa that flips the face around when you shut the car off and becomes a blanking plate. Works great, no issues, sounds fine. I'm buying one for my SL soon and it will not have a CD drive. Don't use them anymore so why have the mechanical device?