we have a 1990 300e-24 that appears to play up after rain. However only when not driven after the rain event. If you are constantly driving it during a rainy period it is fine! You can drive it about 4kms and it starts missing and then completely stalls as you are driving. If left for a couple of hours you can drive it again the same amount of distance but the same thing happens. This happens 3 or so times then all is good. No problems whatsoever after that.
It has been seen by the Mercedes specialist and no faults were logged.
The fuel regulator is good
Spark plugs and leads and coil – good
Distributor and rotor replaced
Fuel pump pressure good at 310psi
Co2 and lambada were adjusted as were too rich
Some other o rings and a sensor were replaced unsure what (sorry)
As a woman it seems like there is water in the fuel, same type of problems as another car we once had. My husband who is a mechanic does not believe it is water in the fuel, but rather an electrical fault. But in the dark can see no leakage sparks. I feel like it is something getting too damp to function properly and has to be run a few times to dry out completely and then all is good.
Do you know what could fit the bill. We live in Queensland in Australia and not near many dealers closest 30kms away and they found NOTHING because the car runs like a dream when not playing up.
1990 model124031b 300e-24 petrol
husband is a diesel mechanic who cant find any problems. been to mb dealer who tested car and found no problems.
I agree with you that it seems like an electrical fault. It sounds that there is a cold solder in a fuel pump cintrol relay.
I suggest you remove the following Electronic details shown on the attached picture: N16, and K1/1. Disassemble them and resolder all the solder points possible. I suggest you let electronics repair specialist do that.
Also we have to determine if we have a fuel supply or the ignition problem.
It can be determined if during the time when the car does not start, is the fuel pump heard working or not while starting the engine.
So please try the soldering of relays. If the problem persists, check how the fuel pump is working. If it is working, check if spark is present by inserting a spark plug into spark plug wire and holding it against the good ground point (use caution, do not hold the wire by hand).
Based on that, i will try to assist you further if the soldering does not help.
Technical support engineer
thanks for your quick reply. my husband who is currently at work until next Wednesday believes he has already checked the K1/1 and it is good. I cannot check the fuel pump starting up until the car fails again which may or may not happen next time I risk driving it. I will get back to you to pay after I have discussed this further. many thanks
Please resolder the K1/1. It is the root of many evils on this car. The cold solder might not be visually seen. Once the soldering iron will touch it, then it will be seen.
Waiting for additional info,
I left the bonnet open all day in the full sun whilst at work today and when I got home I drove it around the suburbs for 10mins and it went like a dream again. I will get the resolder done definately next week when brett gets home so he can watch it being done and check the work. this is a great service, I hope this works. I will let you know any results next week, but wont really know if it has worked until next time it rains!
I left the bonnet open all day in the full sun whilst at work today and when I got home I drove it around the suburbs for 10mins and it went like a dream again. I will get the resolder done definately next week when brett gets home so he can watch it being done and check the work. this is a great service, I hope this works. I will let you know any results next week, but wont really know if it has worked until next time it rains! have you been paid?
Waiting for the additional info from rainy conditions. Yes after the accept i have recieved the payment. Please do not worry, if the problem persists i will do my best to assist you within this question. Just reply.
Hi back again. it is the first time my husband has been able to look at the car being easter and all his last time home. he has done the following to no avail
resolder lower pins on the MAS
replaced fuel regulator reason: could not hold vacuum
replaced emisssion sensor
replaced cam angle sensor
replaced spark plugs
replaced distributor cap and rotor
spark plug leads tested okay
fuel tank pressurises 2 psi
Hope you can give next step in the process
can you please explain with regards XXXXX XXXXX MAS, the correct setting for ambient temperature of 24 degrees at sea level, can there be a problem with the pin depth and could this cause our problem??