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: Some models feature a 10A blade fuse on the rear, though it may be absent depending on the specific production year. Siemens VDO RD3-01 Car Radio - Repair Wiki siemens vdo rd3 01 service manual full
: Standard 8-pin ISO for power/CAN and 8-pin ISO for speakers. Mini-ISO (Blue) Beware of scam sites offering "instant PDF download
To test the unit on a workbench without a vehicle network, supply to Pins 4 and 7, and Ground to Pin 8. Unlike YouTube videos, the manual provides torque specs
Unlike YouTube videos, the manual provides torque specs and order of operations:
It is possible to add an AUX input by soldering directly to the audio input lines before the amplifier. Note that this requires switching to CD mode and has no volume control from the radio itself 1.2.1. 5. Upgrading the RD3-01: Bluetooth and AUX