Locked the 2008 GL 450 with Key fob. Fob works to open occasionally and may need to replace key battery, which I will do. However, I need to find out for security reasons how to make the mechanical key raise the driver's side door latch (only door with a mechanical key entry).
Presently the Fob will not unlock (car battery is brand new!). Took Mechanical key out, turned 90 degrees counter-clockwise twice, nothing. Door latch (drivers side) will not raise. Anyone with an answer or solution?
MB dealer head mechanic is of no help.