'02 ML 320, 11K miles, with optional M-B illuminated running boards.
Vehicle was T-boned and required replacement of the left running board, among other things. Repair shop neglected to check condition of the light strip prior to installation of new running board and was at a loss to explain why neither illumination strip was functional after completing repairs.
Upon further investigation, 6 volts were found to be present at the harness plug for the left strip and 0 volts at the plug for the right. Shop decided that shorting the harness plug for the left side would cause the right side strip to illuminate, which it did not, and now the interior lamps fail to operate when the doors are opened, the central locking system is activated or when the light switches are pressed manually. The interior lamps are not listed on the engine compartment or interior kick panel fuse box covers; inspection of all fuses revealed no faults. Shop now declines to pursue the illumination strip repairs, due to lack of qualified personnel.
Any idea as to what happened here? Are the interior lamps controlled/protected by the AAM?