Hello to everybody. Am looking 4 some help ave got a c class w203 diesel with a battery/alternator fault coming up on the display. Now ave tested the battery and it is ok. Ave also checked the charging and it is ok. So a went to local garage to put on diagnostic machine and it has gave me a print out saying

Code 004
2245- check component stored G2/5 (200A alternator with bit synchronous interface) communication fault.

Does anybody understand what this means!