It's really not any more difficult than most modern climate control systems. Conventional wisdom should apply. If you are not experienced in these types of repairs I wouldn't recommend learning on your MB. I would also not trust Pep Boys or similar shops to work on your car for anything. To many expensive components in the system. Use MB refrigerant oil and make sure you add an approved ultraviolet dye to the system. If it is discharged, something is leaking and this will be the only way to diagnose it.
\'06 E 350 (Yes, it\'s loaded)
\'04 G35 Coupe 6MT (Traded in 4/06)
\'02 CLK 55 //AMG (RIP 8/04)
\'97 C 230 (Traded in 12/04)