Date registered: Dec 2005
Vehicle: W211 E320 Bluetec R129 SL500 - $1300 car ........ Ford F350 6l
Location: CA Bay Area
Mentioned: 9 Post(s)
Quoted: 1119 Post(s)
You will have to start fixing the car better sooner than later. Right now you have 2 permanent failure in locking system and 1 intermittent.
Your door lock should have mechanical linkage even if the central switch is not working. Time to pull the door panel off and take care about it.
Same with trunk lock.
Did you check your model section if they have similar problems?