OK, I know these are 2 entirely differently cars but I need help on how to remove the head units from each of these cars. After looking through a lot of reviews about inputs for an Ipod I have decided to send both head units to Becker to have an aux input added. At $100 plus shipping for each unit this is much cheaper than to buy a aftermarket adapter for each of the cars. I have also looked at numerous posts regarding the Monster cable Icar FM transmitter which according to reviews seems mediocer at best. I have made up my mind after much reading and just need help on how to remove the head unit from each of my Benz's. Any help is appreciated.

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1999 SL500 87K
1994 E320 112K
1998 Ford Ranger - the daily driver 274K and no major repairs (an indestructible truck)
1978 Pontiac Trans Am 110K
1977 Pontiac Trans Am 130K
1999 SL500 87K (the garage queen, only out in the summer)

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