Hi there,
I have a 2003 w211 320 Merc. Recently, multiple electrical issues have been appearing in the cabin. Key malfunction error, oil level error (when level is fine), various displays flashing, such as thermo control, parking sensors etc.

A dealer has taken a look and all they did was reset the battery and tell me that there were multiple error codes and they don't know how to find the route cause. Was wondering if anyone has experienced similar?

Any help much appreciated.


Sounds like there are multiple issues going on. My guess would be that there is bad SAM module. But your comments remind me of a W210 that I had that had multiple electrical issues like yours. The dealer couldn't find what was wrong. After spending many sleepless nights, it turned out the wire harness wasn't connected properly to the ECU. This was a car that was in prevous accident. Did they print out the codes for you? If not, do you have a scanner that will read codes?

Plain text

  • Allowed HTML tags: <a href hreflang> <em> <strong> <cite> <blockquote cite> <code> <ul type> <ol start type='1 A I'> <li> <dl> <dt> <dd> <h2 id='jump-*'> <h3 id> <h4 id> <h5 id> <h6 id>
  • No HTML tags allowed.
  • Lines and paragraphs break automatically.
  • Only images hosted on this site may be used in <img> tags.
The content of this field is kept private and will not be shown publicly.

Disclaimer: Youcanic has made every effort to assure the accuracy of the information on this page. Neither Youcanic nor its affiliates assume responsibility for any loss or damage due to any errors, omissions, lack of information. You agree to hold Youcanic free from any liability arising out of the use of any information contained within. All pictures and references to trademarks and car names are for reference only and do not imply an association with the manufacturer. Consult your owner's manual or authorized factory manuals when performing repair procedures. By entering this site, you agree to our Terms & Conditions and Privacy Polity.