AW: The physical shape of the OE radio or navigation must be identical with the ZE-NC4612.

Mercedes-Benz A-Class (W169) and B-Class (W245) models equipped with OE Radio 5 or radio-ready provision, require additional mechanical work to have the dash board install opening prepared to be physically compliant with the device.

MB Sprinter II vehicles fitted with radio provisions, require a cable harness N-ZE-NC620D-ISO and the MB original mounting frame, part number A9066890431 (also see ZE-NC4612 mounting instructions).

The ZE-NC4612 is equipped with a phase diversity tuner. That means that both antennas inputs of the device must be supplied with an appropriate FM signal. A second FM antenna can also be retrofitted, depending on the target vehicle. The obtainable results vary and depend on placement of the second additional antenna and the sensitivity of the antenna itself. Another additional option is provided by the ZE-NC-ANT3 antenna adapter, which allows to connect and operate a single FM antenna with the double the double Fakra input of the ZE-NC4612.

MB vehicles which are factory equipped with a black Fakra plug require the Phantom power supply to be set to OFF in the device settings of the ZE-NC4612.

For some vehicles, a second antenna is already physically present in the vehicle (but not active) and can therefore be activated. For this purpose, the single antenna amplifier module must be replaced with a diversity double module (MB part number A6398202289). The second antenna, if it is physically present in the car, then only needs to be connected to the diversity module. The power connection of the module is no longer required (yellow wire), since the diversity module is powered via the ZE-NC4612 antenna phantom power. Finally, a second antenna wire from the module to the device must be installed. Retrofitting of this kind is best done by authorized ZENEC specialty retailer.

General limitations: For some Mercedes-Benz vehicles manufactured with radio provision only, steering wheel remote control functionality may be limited to volume-up / volume-down.