ASR light turns on, by low speed

[Cobben]

I have a W129, or 500 SL, wen i'm driving on low speeds approx 20 miles, or 40 miles, de ASR wil turn on and wouldn't turn off util I stop the car. I must stop the car and stop the engin running. After I have started the car again, I can drive for a few miles 1 or 2 or 3 miles and the light will turn on again.
The engin turns, have most of the times as it happes low rpm's, if the engin will be driving at high speeds over 60 mph, the ASR has never turn on.

Can someone help, by finding the problem, and when i go to a dealer every there is a big bill. for exemple 600 euro for new ABS sensors on the back, almost the same amount for the ABS sensors in the front. 500 euro for two new rotors and so on. But the faillure is stil i the car and not been found.

I sorry for my writing, i from Holland :Oops:

 

[Cobben]

I think I have found the answer, I have a Big Soundstream LIL Wonder sound system is in my car, it needs some power (NC 1 7), if you drive on low speed your wil make low rphm the lightmachine makes also low rpm, the battery, will sucked out by the soundsystem. Low voltage and Amperes will turn the ASR light on! A test, I have made is by pulling out the fuse out of the fuse box, the ASR must then turn off, and the ASR on the dashboard will go on.

If you have a problem like that look for big consumption accesories, the problem likes to seem in there.