nismogtr10

Hi dear fellas,

i have a complicated situation with my GLK 2012 BASE , my taillights and blinkers doesn't work! one day only stop working... and the rear upper led stoplight, all the 3 i have no brake light and blinker.


Only reverse light is working, i have no check cluster light or anything, i check all the fuses and are ok, (i have negative line and positive) the voltage is very low .9V in the brakes lines. i Connect the OBD2 computer direct in the SAM rear module and no appear any error.

i guess that is the SAM rear module but i don't know,


PLEASE save me lol thanks¡!!!

nismogtr10

Any ideas?

JohnnyC

man this sounds complicated. You already did the common checks, maybe you need to take into a mechanic that specializes in Mercedes.

bop11

Sounds like a disconnected CAN bus. Do you remember doing anything on the day they went out, clean under seats, change spare tire? The rear SAM control unit PE 54.21-P-2108FAA ( may be for later model) or the front SAM PE54.21-P-2106FAA (again may be for later model) talk to each other through the CAN B interior bus and the CAN E chassis bus. The front SAM control unit with fuses is on the driver side under the hood against the fire wall, not near the battery.

Mmr1

nismogtr10

Thanks, we are checking that but seems that its de rear sam i will try another one
yes we check that, we don't have voltage in the rear lights (exterior or interior) also neither in the auxiliary 12v

nismogtr10

solved,

have to change the rear SAM control unit.