Mercedes Repair Questions? Ask a Mechanic for Answers ASAP
Please look at the picture below. This is K40 relay module.
Just to make sure we are on the same page here because there are two relay modules, could you describe which functions are controlled by the relay you are asking about?
Does your car have a mechanical or electronic ignition key?
Thank you for clarifying. To access it, you will need to remove the front left fusebox cover. Below is the picture of it. 97 was a model change year, let me know if you see a bit different picture. But the location of combination relay was unchanged. Quite often the problem described is caused by cold solder joints on the electrical plates of the relay, so a good soldering job might solve the issue.
Again, sorry for the delay. I have taken a look at it. I am guessing it is the one that looks lilke the one in the picture. It does not have N10 on it. There are 3 other relays in there. 2 are smaller and square and the other one is held in place by a bracket kind of thing.
I do not see any problems with the posts on the relay.
Would a faulty relay be the likely cause if the wiper turned on by itself and the turn signals worked every now and then. By the way the wiper will sometimes come on when I start the car. By turning the car off it will then turn the wiper off. Restarting the car seems to fix the problem for that period of driving. At other times I have been driving and all of the sudden the wiper just starts, well, wiping. Again, turning the car off and restarting makes it stop.
The two things these systens have in common are the combination switch and this relay. So it should be the relay's fault if the switch has no effect on the problems. It will not have N10 written on it. If in doubt, remove the relay and then switch on turn signals and wipers, they will not function with the relay out.
If you have friend who deals with electronics, tell him that you mostl likely have a cold solder issue in the multi-functin relay, and he will know what he needs to resolder. The relay must be taken apart for this, you will not see any damage unless it is disassambled.