These came on on my SLK today so I unplugged the sensor of exp tank and shorted plug out with engine running. No change to lights.
Removed R/H front wheel , removed 2 screws under front floor and pulled up iner guard away from washer bottle.
Started engine, removed plug off washer level sesor... voila... lights out.
Beuty, dont need this sensor so Ill just run a parallel pair of wires into engine bay and use a connector to short out.
Reassembled flap etc.
Started engine ... one light still on... Windscreen washer
MB are clever. Even though both lights come on if a fault you cant trick the circuit. Each sendor has a series / parallel resistor network. (see pic)
Now Ill have to use differne t resistors to trick it or buy anew sendor. Didnt want to break the seal on the top of washer bottle.. bugger. Next weekends job
It's early here and maybe I haven't had enough coffe yet but I can't figure out from your description why the lights went off when you shorted out the washer level sensor and why that light is still on after you ran the parallel wires that you shorted? I'm going to drink a second cup and study the diagram some more.
It's early here and maybe I haven't had enough coffe yet but I can't figure out from your description why the lights went off when you shorted out the washer level sensor and why that light is still on after you ran the parallel wires that you shorted? I'm going to drink a second cup and study the diagram some more.
I thnk they went off 1stly as engine was running when I shorted leads and diagnostic only happens when you 1st start.
Individual light only comes on if leads shorted before starting as diagnostics measures circuit resistance and determines fault from that.
I d say each seder has a different combination of resistors so comp can identify.
The other unit in parallel is a glass encased reed switch. A cylindrical float with a small toroidal magnet runs up and down the water side of the tube depending on level. When it is near the bottom it atracts the reed and circuit is made telling Comp you need water.
Well done. My coolent level sensor died too and only that light on the dash - after 3 trips to the dealer while they figured out which part they needed (initially told me it was actually the washer level sensor - then ordered the wrong part - then figured that it was actually the coolant level sensor - d'oh!), and $150 or so for a new coolant reservoir it was fixed. They didn't dare charge me labour after all the inconvenience they caused me. They didn't give me the old reservoir though... could have fixed it as a spare. Looks like a common problem.
__________________ <br>
“Perseverance is more prevailing than violence; and many things which cannot be overcome when they are together yield themselves up when taken little by little." - Plutarch.
My coolant level light has been on for months. I used a 3/4" round piece of black electrician's tape to cover the light. I like Bazzle's fix much better, but my head exploded when I tried to follow the fix instructions. Bazzle; if you ever visit the Phoenix area, I'll buy you a steak dinner (and a few Fosters) if you'll stop by and fix my wife's SLK.
Linear Mode
