adamejorge

i took my car to the dealer after it would start , they said the ignition starter fuse has blown but can not be replaced since it a big amperage fuse that is not sold separately therefore the only solution is to replace the entire fuse block ( fuse box with applicable fuses) . This fuse block , as Mercedes calls it, carries 4 major fuses. The cost of repair , including labor,is a whopping 980 dlls ... Any ideas out there??? it is hard to believe a fuse can't be replace ! that why i'm asking the vehicle is 2008 c300 (204) Mercedes sedan... Please help

Carsy

I would ask them what number is the fuse that is blown. Then look on the cars fuse Diagram. Fuses 6,7,19 & 27 are connected with the starter.

Good luck.

adamejorge

I talked to the dealer they are saying that this is a 240 amp fuse... Let's say that i did find the fuse else where for less , the installation requirements are not that easy. It's not just plug and run fuse. It needs to be programed into the vehicle system by dealer. I believe independent Mercedes mechanic can't get into the immobilizer computer system, at least the one i took it to , prior to the dealer, could not get the issue solve. Any advice and what option i have ? other than this the dealer.. I wonder what's the root cause of this fuse to blow.

jimmythegreek

either they are not explaining this to you correctly or u dont understand them completely. There is NO way this is a 240amp fuse, think about it for a sec. The alternators in our cars are 110 or 125 amp, depending on the options. The main fuse block is under the hood and its pretty easily changed if thats what it is. You could order the part anywhere for half that if not less. If they are talking about the key module different story, that is the immobilizer system. The only other main fuse block is in the rear trunk pass side, and some cars have a small fuse block on the pass door dash side, but they are minor fuse systems. Try and get a detailed diagnosis from the indy shop or dealer

Whargoul

Please turn on your brain. The alternator has nothing to do with the starting system.

jimmythegreek

excuse me genius, Im so sorry, my brain must be off. I only work on these cars everyday, guess I know nothing.

Whargoul

You are correct.

Carsy

Don't worry Jimmy, this bloke is well known as a Sh#% stirrer on the diesel forum. Ignore him.

Diesel Benz

I don't know who is who but the biggest fuse from the front prefuse box I found was 400 A. The battery can provide this and more, this is why the car has fuses bigger than the alternator capacity.

I'm not sure which fuse the OP is talking about, it could be the pyro-fuse that is like an SRS system component and likely needs diagnosis tools to reset control units if this fuse has blown.

adamejorge

Long story short it was the pyro-fuse like Diesel Benz said ... All it is, is a cut off fuse when the vehicle is in a wreck , like mine was . The fuse blows and does not provide power to the alternator..

FYI
this pyro-fuse its actually The whole box where you can jump the car with . It has a “positive” nipple attachment where you anchor the positive jump cable at …It seat close to the battery compartment

juice619

hey adamejorge, by any chance did you odometer or cluster warning lights show before you changed the pre-fuse box??

Glyn M Ruck

We are talking two separate issues here.

Start enable fuses are 31, 52 & 57. 52 usually blows & should be upgraded from 15 amp to 20 amp if your starter motor ever refuses to turn over.

The other device is a high power fusible link designed to prevent a car fire etc.

nesgael1

I think that I am talking to the rigt person. I changed my shifter on my 2003 sk500 [r230] the car had water damage. I have no communication between the shifter and the DAS driver authorization system. I am about ready to buy a STARS scanner. I have no Idea what I am doing. I use a launch and a snapon scanner and I have never done coding or adaptation. Do you have any advice. I think that the ignition switch is trying to authorize the shifter to unlock without success. do I have to recode or what do you think

Thank you

sebasendallas18

hi guys the same happend to me and i just replaced the pyro fuse but still not crank ,do you know if i need to reprogram some thing thanks

sebasendallas18

hi guys the same happend to me and i just replaced the pyro fuse but still not crank ,do you know if i need to reprogram some thing thanks