Monitors right front brake pad wear sensor, coolant level indicator with windshield washer fluid level indicator and Anti-Theft Alarm, hood switch. It also handles pumping for the windshield washer nozzle and pumping water for the Headlamp Cleaning System, the radiator fan for coolant, the fan for the transmission oil cooler, and the circulation pump for the heating system delivery unit. Handels right, front lights and the side light, center console storage, lights in the glove box and eyeglass compartment, ashtray, and footwell. Left SAM also receives signal data from the left front brake pad contact sensor, A/C pressure sensor, refrigerant temperature sensor, brake fluid indicator, outside temperature sensor, and parking brake indicator switch. It handles left front lights, side lights, a rear air outlet, illumination, glove compartment lock illumination, light switch, steering column adjustment motor group, ESP, SPS, and BAS control, AIRMATIC with ADS control unit, ABC control unit. Left SAM is located in the engine compartment.Mercedes-Benz cars may have rear and front SAM modules. The fuse box usually installs most SAM modules. Where is the SAM module located on a Mercedes-Benz? The location of the SAM module depends on the Mercedes-Benz chassis. That would be the same as connecting your printer directly to your computer via a USB cable. Not all cars have SAM & Controller Area Network. Think of CAN Bus as the ethernet cables and wi-fi that make your home network communication possible. You may also hear the term CAN Bus which stands for Controller Area Network. If you hit print on your PC, the data (signal) gets sent to your network printer via the wireless router (SAM unit). All your devices, network printers, phones, and computers (switches, window motors, sensors, etc.) communicate via your router. Before you replace the front SAM module, check the water valve (the changeover/duo valve) first. Mercedes Blowing Only Cold Air – This problem could be caused by a defective front SAM module.In this case, we are not getting any communication with the module, which is most likely an issue with the SAM unit. Center Dashboard Buttons don’t work – Currently, we are working on an S-Class in which all the center buttons ( hazard light, head restraint, AIRMatic switch, etc.) don’t work.Other symptoms of a bad rear SAM include doors showing open all time, even when closed. Taillights staying on – If one or both of your tail lights stay on constantly, your rear SAM unit may be defective.Other possibilities, such as a defective audio gateway unit or a bad power seat motor, should be eliminated. Battery Drain – A defective SAM module can cause battery drain when a Mercedes-Benz is parked overnight or for several days.Don’t use a higher ampere rating fuse to try to fix this problem. Especially if you replace the fuse and it keeps on blowing. If this is your dilemma, you may notice a blown antenna fuse. The antenna is connected to the rear SAM module, and a short in the wiring can cause damage to the SAM unit. Poor key fob / keyless entry range – The doors’ key lock and unlock signal is transmitted via the rear antenna.Fuse Keeps Blowing – If you have a fuse that keeps on blowing, it is possible that the SAM module is defective and needs to be replaced.You should always avoid splicing wires to get power for aftermarket HID lights, alarms, or connecting a trailer hitch. It can be that the left or right low beams, fog lights, or turn signals may not work. Lights are not working – We have seen many Mercedes-Benz where one or a few lights don’t work.From here, the fuel level data can be sent to the instrument cluster or the engine control unit for computing the remaining distance based on fuel level.
The signal on Mercedes-Benz must be sent to the rear SAM since it is the closest unit in the Controller Area Network.
In cars without CAN / SAM, the signal is sent directly to the instrument cluster via two wires.
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