How to get SDconnect C4 to work with Mercedes 24/12 volt cars

some of the NEC Chips are Broken 4 PCs and same the small board power chip i Change it and now they work on 12V too

i change the first line from left side

Replace the chip

SD connect C4 china clone with boards of high quality:

Source: http://www.obdexpress.co.uk/wholesale/mb-sd-connect-compact-4-star-diagnosis-hdd-d.html

SD connect mux with PCBs above is confirmed to work no issues with Mercedes 12 and 24 volt cars.