Question about Mercedes-Benz C230
C230 Key Won`t Turn the car on 12.8v, will start only with 14.3v , new battery
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
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Sep 12, 2014 | 2004 Mercedes-Benz C230 Kompressor
Dec 21, 2012 | Cars & Trucks
Nov 14, 2012 | Cars & Trucks
Dec 04, 2011 | Mercedes-Benz S-Class Cars & Trucks
Aug 07, 2011 | 2003 Mercedes-Benz E-Class
Dec 10, 2017 | Mercedes-Benz E-Class Cars & Trucks
915 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: