Hi all. Now I'll start with an apology in case I have put this in the wrong place. I'm sure that someone will move it if I have. Now for some help please. I have a 02 R170 SLK 230 which was bought for the wife. When the interior lights are switched on they stay on. I have checked the door switches and they are going in as I understand they should. The boot interior light is broken and I am trying to source a new one. Is there switch in the boot that operates all the interior lights? When I take the cover off the interior light I am presented with what look like TV remote IR emitters and on the other side a circuit board. Any clues what they are for? IR receiver??? Is there a service manual you can get for the SLK? On top of that one of the remote key fobs does not operate the central locking and I have tried new batteries. Is there any way into them or is it an expensive visit to the dealer? The interior door lock will unlock but will not lock. I presume the switch is faulty but any suggestions most welcome before I start pulling things out. Sorry to trouble with so much on my first post but they are really annoying me. Thanks in anticipation.