ASR Lights Up & Loses Power

It is to notify you that something else is wrong. It is designed this way so you pull over and take care of the car. It is in your book. I needed a new battery.

have you checked your wiring harnesses? they could be messed up, causing lots of strange errors. you should check your wiring harness as this problem is common in the pre-1996 r129 SLs. good luck.