W124 Coolant level sensor plug
 

Since I am about to drive a cross the desert I have been taking a long hard look at my cooling system. I replaced everthing and I do mean everthing six months ago..except the coolant level sensor and the top radiator hose I am doing so now. I have already replaced the hose, and I was going to change the level sensor except that the dealership is out of stock at the moment and I dont have time to order one. So the parts guy gave me a plug that is used in the SD's. He wasn't too sure it would work , but one of the other guys was. I thought I would post here and get your suggestions. The plug looks a little wimpy to me but if it works...Well that will be A Ok with me. Here is a pic of the coolant level sensor as it sits...And the other is of the plug they gave me at the dealership. Will this work? Thanks :)

And....the plug they gave me at the dealership.

This is the only kind I've ever seen..It's plastic compared to the rubber plug shown above.. Thanks again !

the rubber plug that you were given is the wrong one.

that is used on the c200 model cars on the 5 litre water windscreen washer reservoir.-i recently replaced mine and hence am able to confirm the facts above.

you will note that the coolant level sensor has an electrical sensor in it where as the rubber plug is just a plug to stop water from leaking out of the reservoir.

hope this helps.:D :cool:

Ahh that makes sense. I didnt think this little bushing could take the pressure of the cooling system...

The car originally came with a sensor but I am trying to plug it rather than replace it again for the second time. I check my fluids everytime I stop at a gas station and I'm not sure it would work if I put a new one in... Since the plug is cracked and badly corroded as seen in the first pic. :)

i agree that the plug you were given will not be able to hold the pressure of the cooling system,so if i were you i would not try it !

the other question is why are your sensors cracking?

is there iexcessive pressure build up causing the sensors to crack?:cool: :cool:

New sensor 124-540-02-44 new contact 003-545-26-26 x2 new pin housing 001-545-71-28 replace it all .

I was thinking I changed it twice but now that I think about it maybe that was the 300SEL. thanks for your reply.

MB stars,

Thanks for the PN's I think I'll go ahead and change it all.