Mercedes - GLA - Workshop Manual - 2020 - 2020

3950 NW 120th Ave, Coral Springs, FL 33065 TEL 561-955-9770 FAX 561-955-9760 Mercedes Benz NTG5+ MOST150 to 12-channel Analog & Digital sound processor ` NTV-KIT871 WARNING: Do not connect any RCA cables to the ZEN-M interface or additional processors prior to properly grounding aftermarket amplifier(s)! BHM/TY 11/19/20 NTV-DOC319 Overview The NAV-TV ZEN-M processor seamlessly converts late model Mercedes factory MOST-150 audio bus to 12channel analog RCA and TOSLink output. Adding aftermarket amplifiers to the OE NTG5, 5.1, 5.2 or 5.5 system has never been so simple and seamless. This kit integrates with the OEM M.O.S.T.® bus to retain volume control, full fade (analog only) and balance, treble, mid-range, bass control & Bluetooth voice calls with no external speaker (true OEM integration). NOTE: vehicles not equipped with a factory amplified system must be flashed with NAV-TV’s ZEN-M-PRG (NTV-KIT866, sold separately) prior to installation. Vehicles equipped with an OEM amplifier do not need to be flashed. Kit Content ZEN Power Harness NTV-HAR316 ZEN MOST Fiber NTV-CAB134 ZEN-M Interface NTV-ASY272 USB Cable (updates) NTV-CAB009 ZEN RCA Harness NTV-HAR315 ZEN-M overview USB (updates) Power connector Status LED TOSLink output MOST 150 fiber input --FUTURE USE-- --FUTURE USE-- DIP switches Analog RCA outputs 2|Page BHM/TY 11/19/20 NTV-DOC319 ZEN-M Compatibility (NTG5, NTG5.1, NTG5.2, NTG5.5) NOTE: All vehicles require NTG5+ radio, regardless if listed on this chart. See radio pictures (below) to gain an idea of what to look for. NTG5, 5.1, 5.2, 5.5 Month, Year(s) 09/2015+ 11/2014+ Any 2014+ Any 2015+ 03/2015+ 08/2014+ 08/2014+ 11/2014+ 06/2015+ 10/2016+ 09/2016+ 09/2015+ Any 2016+ Any 2016+ 11/2015+ Any 2015+ 08/2015+ Any 2016+ Any 2014+ Any 2014+ Any 2015+ Make Mercedes Mercedes Mercedes Mercedes Mercedes Mercedes Mercedes Mercedes Mercedes Mercedes Mercedes Mercedes Mercedes Mercedes Mercedes Mercedes Mercedes Mercedes Mercedes Mercedes Mercedes Chassis W176 W246 W205 C205 X117 X218 W218 W212 C207 W463 X166 X156 X253 C292 X166 C190 W166 R172 C217, W222, X222 W447 X222 Model A-Class B-Class C-Class Sedan C-Class Coupe CLA-Shooting B CLS-Shooting B CLS Coupe E-Class Sedan E-Class Coupe G-Class GL GLA GLC GLE GLS GT AMG ML SLC S-Class V Maybach 3|Page BHM/TY 11/19/20 NTV-DOC319 ZEN-M Installation 1. If this vehicle has a factory amplifier, it must be removed and the ZEN-M can be installed into its place. If this vehicle is not amplified from factory, install the ZEN-M behind the radio. 2. Connect the following wires from the provided power harness: Wire Side ZEN-M pin 1 3 4 6 Color Yellow Violet Black Blue To vehicle: 12v (+) Constant --Reserved, NOT USED-Ground (-) 12v (+) remote output* *This remote wire must be used for aftermarket amplifier remote for proper functionality. A relay must be used for reliable turn-on. 3. Before connecting power to the ZEN-M, adjust dip-switch settings for the desired options: TOSLink DownMix* DIP 3 Loudness Full Scale output (0 dB) DownMix ON Loudness OFF Driver Focused -12 dB output DownMix OFF Loudness ON Position UP (off) DOWN (on) Time Alignment DIP 1 Attenuation Front Row DIP 2 DIP 4* Vehicle Settings DIP 5 Phone Attenuation OFF Phone Attenuation ON DIP 6 OFF OFF *NOTE: DownMix ON mixes vocals from center channel into Front and Rear L+R output channels. 4. If using analog RCAs for signal to the amplifier, connect according to the reference chart below. WARNING: Do not connect RCA cables to this interface until all amplifiers/external processors are properly grounded. Failure to do this may cause damage to the interface and VOID the warranty! 1 Left Front 2 Right Front 3 Left Front 4 Right Front 5 Left Front 6 Right Front 7 Left Rear Door 8 Right Rear Door 9 Left Rear Center 10 Right Rear Center 11 Center 12 Sub 5. If using TOSLink for signal to the amplifier, connect the cable to the TOSLink port shown on page 2. NOTE: both Analog and Digital output sound simultaneously, regardless of which type is used. 6. Connect the provided MOST Fiber Cable from the (previously removed) amplifier, or from the radio’s fiber port to the MOST port on the ZEN-M. NOTE: if fiber already exists at the head unit (for SAT radio, etc), you must add the provided MOST fiber cable into the OEM MOST loop (see next page). 4|Page BHM/TY 11/19/20 NTV-DOC319 ZEN-M General Installation Notes • This interface can be installed in vehicles with or without an amplifier & with or without MOST fiber optic presently installed. 1. Vehicles with fiber amplifier: the amplifier must be removed. Connect the OEM fiber previously connected to the amp, directly into the ZEN-M. 2. Vehicles without OEM amplifier or MOST fiber: Use the supplied fiber optic extension and connect from the fiber port behind the radio to the MOST fiber port on the ZEN-M. NOTE: If the vehicle is not equipped with an OEM amplifier, you must program the system for external amplifier for the ZEN-M to operate properly. Use NAV-TV’s ZEN-M-PRG programmer (NTVKIT866 sold separately). 3. Vehicles without amplifier but still equipped with fiber*: Disconnect the fiber from the radio, disassemble the fiber coupler and route the provided MOST extension into the factory MOST loop like shown below (to continue proper MOST data flow): *NOTE: in this scenario, the vehicle still must be programmed for external amp (see red note above). • • • Tuning tips: 1. Before beginning tuning process (especially with external EQ/Processors), set Bass & Treble on the head unit for each source to flat (0). 2. Begin with amplifier/EQ gains all the way down. 3. With dynamic music playing, adjust the radio volume to maximum. 4. Adjust the amplifier/EQ gains to desired maximum level. For Mercedes, there is no separate dedicated subwoofer control. NOTE: The CENTER Channel in some Mercedes vehicles is a DUAL-VOICE coil speaker – one coil is connected to the factory amp the other coil connects to the OEM Mbrace module – see page 9 for wiring diagram. 5|Page BHM/TY 11/19/20 NTV-DOC319 Multi-Color LED Status Indication LED Status Solid Red Violet Blinking Red Blinking Blue Indication MOST Active MOST traffic commands Peaking (maximum digital signal level achieved) PC Link with app (future use) ZEN-M System Layout (analog) For ZEN-M installations, the factory amplifier MUST be disconnected (if equipped). 6|Page BHM/TY 11/19/20 NTV-DOC319 ZEN-M System Layout (digital TOSLink) For ZEN-M installations, the factory amplifier MUST be disconnected (if equipped). Mercedes Benz options for audio control When flashing the vehicle for fiber (if not factory fiber or amp-equipped) using the NAV-TV ZEN-M-PRG (KIT866), the OEM Mercedes sound system will allow Bass, Treble and Midrange controls. • There is no separate subwoofer controller for Mercedes-Benz. 7|Page BHM/TY 11/19/20 NTV-DOC319 ZEN DownMix Scenario Examples Source Signal DownMix TOSLink Output Stereo Analog FRONT OUT Stereo Front Analog SIDE OUT (7,8) Stereo Rear Analog REAR OUT (9,10) Stereo Rear Center Channel OUT Muted 2 Channel (Music) ON 2 Channel (Music) OFF Stereo Front Stereo Front Stereo Rear Stereo Rear Center 5.1 Surround 5.1 Surround ON Mixed Stereo* Stereo Front Mixed Stereo* Stereo Front Front + Center Stereo Front Front + Center Rear + Center Rear Back Surround Rear + Center Muted Stereo Front Side Surround Rear + Center Rear Back Surround Rear + Center Rear Back Surround OFF 7.1 Surround ON 7.1 Surround OFF Center Muted Center SUB OUT Mono (L+R) Mono (L+R) Mono (L+R) LFE** Mono (L+R) LFE** *Mixed Stereo: (Left = LeftFront + Center + LeftSurround + LFE), (Right = RightFront + Center + RightSurround + LFE) **LFE: Low Frequency Effects: Surround subwoofer output. Left Back Surround Left Side Left Front Center Channel Subwoofer Right Back Surround Right Side Right Front 8|Page BHM/TY 11/19/20 NTV-DOC319 Mercedes OEM Center Channel schematic • The center channel speaker in all NTG5+ Mercedes vehicles are a Dual-Voice Coil speaker. If replaced, and not reconnected to the Mbrace module (wires), you will lose audio from the emergency telematics system. Use the diagram here to connect a secondary speaker (or use the OE speaker) directly to the Mbrace module (Gray/Red+, Gray -). 9|Page BHM/TY 11/19/20 NTV-DOC319 ZEN-M Technical Specifications Hardware & Software Current HW version: Current SW version: Compatible SW (update) OS: --1r0-ZEN-M-2-6-25-20 Windows 7 (64 bit), 8, 10 INPUT Digital Input MOST 150 Fiber Optic OUTPUT Digital Outputs: Digital Outputs supported: Frequency Response (digital): Analog Outputs: Output Voltage Peak: Output Voltage RMS: Analog Output Type: S/N Ratio (analog): Frequency Response (analog): THD+N @ -1dBFS DAC DSP Delay (Time Alignment) TOSLink 24bit/48kHz 18Hz – 24kHz 12 channels (RCA) 6v 2.1v Single-Ended 123dB 18Hz – 24kHz -94dB 48kHz 32bit 32bit Floating Point Selectable Power Supply Current Consumption Stand-by Current Consumption Operational Operational Voltage Amp Turn-On Output Amp Turn-On Voltage Amp Turn-On Current Limitation <1 mA 350 mA MAX 7V – 20V DC Automatic V-batt 500mA Other Dimensions: Weight: Country of Origin: 4”x5”x1 3/8” 10 oz USA 10 | P a g e BHM/TY 11/19/20 NTV-DOC319 FAQ • • • For installations with this ZEN processor, make certain that any added amplifier’s ground resistance (reference vehicle battery ground) does not exceed 1 ohm. If you’ve installed a third-party DSP (receiving signal from the ZEN, before the amplifier) and you’re having issues with audio bleeding from one channel to another, echoing Bluetooth phone calls or any other signal processing issues, rule out the ZEN first by temporarily bypassing the third-party DSP and running signal directly from the ZEN to the amplifier(s) and verify the problem still exists before calling technical support. If the phone/Bluetooth volume is too high, set Dipswitch # 5 down. 11 | P a g e