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. Fuel Level / Gauge not working – The sending unit installed in the gas tank records the fuel level.Here are a few problems caused by a bad SAM unit:
SAM units don’t frequently fail unless there is water intrusion or other problems. All systems on a Mercedes-Benz are controlled via CAN Bus and SAM units any issue you may experience could be due to a defective SAM unit. This is a list of a few possible SAM-related problems.
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