So I've gotten 2 different answers on installing the Continental TR7412UB-OR - in my 99 SL500. The people at ECS Tuning tell me it's not compatible, but the folks at Caraudio24.de tell me it will work, with a inexpensive adapter. The radio is only 100 euros, which is much less expensive than other posters have said that they paid, so I want to make sure that I'm getting the right unit. Also, I understand that the electrical system changed for the 99's, so this is not as easy as installing in an earlier model. I've just inherited the car and am trying to upgrade a few things, so any advice is greatly appreciated. Thx.