08í CLS550 Issue - Mercedes-Benz Forum
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post #1 of 2 (permalink) Old 08-22-2018, 08:21 PM Thread Starter
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08í CLS550 Issue

Hello everyone first time poster ,long time lurker, usually always find my problems here from different topics hence why never decided to post, but this time iím completely stumped. So here is the issue. I was driving my son to school and all of the sudden every single warning light lit up like a christmas tree and all my gauges marked 0 including RPM, the vehicle did not stall so i hurried back home. I turned the vehicle off and tried to turn it on again but nothing happened complete silence, decided to wait and measure the battery voltage which was reading 12.4 with engine off. After maybe 5 hours i decided to go back out and turn it on again and it turned on but then everything started going off again, ABS , ESP, Check Engine etc etc and a big red lighted battery icon. I forgot to measure battery while the car was on (but i will do that once i can turn it on again) to rule out Alternartor/ Voltage Regulator. Friend brought a mickey mouse scanner which of course wonít give me the source of the problem unless i scan with Stars or equivalent ,but to get an idea i did it and the error U0100 came out ,which means lost connection to ECM/PCM. Iíve had this car since 2009 and iíve done most fixes myself since the wearranty expired and would love to keep the tradition going.

Also question is Carsoft MB II Scanner worth it?

Thanks in advance.
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post #2 of 2 (permalink) Old 08-22-2018, 09:16 PM Thread Starter
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Follow up, just got to turn the car on and measure the Voltage and went up to 13.4 to 13 with AC on so the alternator is charging at least, but problem persist my entire dashboard turned off and only the warning lights came on and gauges were at 0 as well.Car will only turn on after it has been off for a long period of time. Any ideas or help would be appreciated.

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