I have tried "Blue Coral car wash" and had better luck with bar soap and a wet cloth!
I have been using Cherry Power from
www.clean-rite.com but you should be able to purchase it from your local auto parts store (I bought another gallon at Advance Auto parts today (hey, at least they are good for soaps and oil & filters on a weekend).
Cherry Power is awesome, it gives my Mercedes a super clean look with a shine. People often ask me how I keep my car so clean and shinny....I tell them that I wash it...and I use Cherry Power! No wax...and I get a great shine every time!
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'87 300E | 2.6 engine
Artic White - Navy blue interior, chrome rims, very clean and sharp!
91 300E
89 300E
The rest of my collection are just cars and trucks...no more "automobiles"...