How to read&write BMW MCU 5M48H by R280 CAS4 programmer Post by obd2express.co.uk The R270 BDM programmer updated version - R280 PLUS BMW CAS4+ BDM programmer, was rolled out now at obd2express.co.uk. This R280 plus can read and write all BMW CAS4, read and write the latest BMW Motorola MC9S12XEP100 chip (5M48H/1N35H). Here, we go to read & write BMW MCU 5M48H. R280 CAS+ IN CIRCUIT Programmer read 5M48H eeprom