Question about 2002 Mercedes-Benz C-Class
Posted by Anonymous on
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Posted on Jan 02, 2017
The starter is turning only when the solenoid close the contact to deliver the current to the starter . When this happens it then turns the bendix to engage with the flying wheel to start the engine.
The reason that you need higher voltage to have correct needed current going through the contact of the solenoid, hence the starter. The contact is corroded or rusty due to high spark at high current at every start time causing high resistance. V=IR the R resistance of the contact now is high so it need higher voltage (14.3 vs, 12.8 V) to deliver the same needed current for the starter.
Unfortunately, the solenoid is integrated with the starter, so you can not just replace the solenoid without replacing the starter.
If you can find the new battery holding at 14.3 V as you mentioned, then that is an economical solution since replacing the starter is costing more.
BTW where can I find the battery at 14.3V in case my friend's car has a same problem?
Posted on Jul 27, 2009
SOURCE: I have a Mercedes 2003
Turn the key and listen for a hum (keep doors closed but a window down and radio off). Don't turn the key all the way to try to crank it, just the turn to get all the lights in the dash on. If you hear a slight hum or buzz that last a second or two that is your fuel pump. If you don't hear it, check your fuse for the fuel pump, if that is not blown, your fuel pump may have gone out.
Posted on May 04, 2011
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