With other cars in the past I would change the flasher capacitor. What do I do with my USA 98 170? Replace the relay? Is the flashing controlled by a computer? I haven't found solid advice here or on any other online sources. If it may be the relay, where is the relay located?
PLB
FWIW, AI told me to "turn the emergency flasher on/off" quickly and several times. It's suggested that the relay contacts are 'stuck' and that the on/off power aspect may free it up. Apparently there is a CCM (Combination Control Module) vs the relay you referred to and that most of us home mech are used to that is involved in that operation.
I'm dubious but it costs nothing to try.
I'm dubious but it costs nothing to try.
A relay on the CCM module is responsible for the blinking. The outermost left when you look at the board while the relays face North.
You may want to clean it. With some luck it will work again, but usually that relay must be replaced. Or the whole module.
You may want to clean it. With some luck it will work again, but usually that relay must be replaced. Or the whole module.
There are quite a lot of threads on the CCM module with photos. Maybe start here:-https://www.slkworld.com/posts/5007698/
Mind you it is a very long interesting thread....4 pages. The OP was confident his mechanic had found the problem but the OP has never been back. Probably not a good sign
Had the same problem. I sanded/filed the points in the flasher relay on my '99 230, as detailed in the post below. It worked. It's the same thing we used to do to ignition distributor points in the good ol' days. It gave them some extra life, and they were cheap & easy to replace when they wore out. That's why those were the good ol' days. Come to think of it, flasher relays were cheap & easy to replace in the good ol' days too.
The problem is that metal moves from one point to the other. A mound builds up on one & a cavity on the other. Then the current remains constant between them instead of going off & on. You need to flatten the mound.
The problem is that metal moves from one point to the other. A mound builds up on one & a cavity on the other. Then the current remains constant between them instead of going off & on. You need to flatten the mound.
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