PeachParts Mercedes-Benz Forum - View Single Post - Another no start

mctwin2kman · #15 11-15-2004, 05:34 PM

A good start would be to check the electrical charging system. Next would be how hot it is under the hood at the time of failure. Also check the grounds and leads to the battery. Engine to chasis ground. Fuel Pump Relay to see if hot as heck when it happens. You will find that most of the time it is a worn electronic, that when it gets hot enough either via actually heat or the fact that it is going south it will fail. Electronics are very heat sensitive, especially if near there max operating temperature, which will lower in some cases when aged. Sounds to me that you have a heat type issue here. Especially if it happens when idling for an extended period of time. Also could just be the engine does not like to idle that long and maybe floods out. I don't think anyone recommends running an engine at idle that long unless it is a diesel. The combustion chambers and exhaust will get super hot that way. As I type that the thought of th cat comes into mind as well. They tend to get hot when idling and I have seen them become red hot when idling for too long, since no air flow is passing to cool them. Next time look at your cat as well, if she is red she is going to restrict air flow and damage the cat. I have sene people catch there car on fire due to prolonged idle times.

May I ask what makes you idle for such a prolonged period of time? Is it something related to traffic or your job, or do you just like wasting gas? Just curious as the root of this problem could be due to idling so long and heating everything up without a good flow or air or coolant or exhaust gases!