Okay the dealer may be right,the wiring sometimes breaks from opening and closing trunk,the trunk release operates on the same power as door locks, if door locks work its not a fuse,check the wiring harness in the trunk near hinge, this system is a complex one,so if you dont see a broken wire in the harness,(you will have to untape the wiring to see every wire) have a tech check the system.
I have a e320cdi 2005, can not open boot with key or the internal button. The only way can get it open is the little key(manually). Checked all fuses are ok. When it rains sometimes I get a message on the dashboard rear parking lights not working. Taken it Mercedes done all diagnostics and can not find a problem. Has anyone experienced similar problem?? Help!!
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