Electrical problem
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Newbie
Joined: Sep 2022
Posts: 7
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CLS 320
Electrical problem
Hi
I bought a CLS (CLS 320 CDI (219.322) year 2006 engine OM642) that not riding for a long time and after starting it turned out that there was a problem with the electrics.
I have changed new main battery because previous was empty and I realized that:
- direction indicators and emergency lights do not work
- electric seats do not work - central locking does not work
- red alarm battery is on
- strange but the registration backlight is on all the time
- and more
The first thing I thought and what they write on the forums is that the additional battery is a replacement, but interestingly in my model there is NO additional battery.
I checked all the fuses with the meter - they are OK.
HELP
I bought a CLS (CLS 320 CDI (219.322) year 2006 engine OM642) that not riding for a long time and after starting it turned out that there was a problem with the electrics.
I have changed new main battery because previous was empty and I realized that:
- direction indicators and emergency lights do not work
- electric seats do not work - central locking does not work
- red alarm battery is on
- strange but the registration backlight is on all the time
- and more
The first thing I thought and what they write on the forums is that the additional battery is a replacement, but interestingly in my model there is NO additional battery.
I checked all the fuses with the meter - they are OK.
HELP
Out Of Control!!
Joined: Apr 2019
Posts: 11,958
Likes: 6,802
From: Silicon Valley
W212 MY'14 M276-3.5NA @75kMi
1-- Can you measure the battery voltage with engine stopped as well as with engine running?
I am guessing the charge voltage is not reaching battery...
2-- Are you able to fully charge your battery with a smart charger such as CTEK?
3-- Scan the car for faults with a scanner!!
You won't get lucky swaping parts without reading what the car has to say...
You're going to find out that SAMs are used to switch circuit power.
I am guessing the charge voltage is not reaching battery...
2-- Are you able to fully charge your battery with a smart charger such as CTEK?
3-- Scan the car for faults with a scanner!!
You won't get lucky swaping parts without reading what the car has to say...
You're going to find out that SAMs are used to switch circuit power.
Last edited by CaliBenzDriver; Sep 27, 2022 at 10:29 AM.
Out Of Control!!
Joined: Apr 2019
Posts: 11,958
Likes: 6,802
From: Silicon Valley
W212 MY'14 M276-3.5NA @75kMi
R-SAM: guilty!
Always glad to help with many other contributors.
NEVER LET YOUR BATTERY GET LOW if conveniently possible. Keyword CTEK or similar ✌️
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