Mercedes 300CE MYSTERY
#1
Mercedes 300CE MYSTERY
Ok i got a 1991 Benz 300CE and i am having some problems...First here is the thing: WHenever i am on park and i rev the engine and the engine sounds really really solid and good, but whenever i am driving the car it has this slowdown at the start and it really takes few seconds to pick up speed and the power isnt there when going from 20mph up to like 40-50mph...Any suggestion guys because i have changed some stuff such as the Rotor and the Cap and some minor stuff but still same, any help would help thanx alot
These are some pics of that small thing that connects to the engine but its broken and its out and it doesnt go back in anymore, i was just wondering what does that do, and whats it for? Do you guys think that could be the problem?
These are some pics of that small thing that connects to the engine but its broken and its out and it doesnt go back in anymore, i was just wondering what does that do, and whats it for? Do you guys think that could be the problem?
Last edited by Benz_300ce; 02-18-2008 at 05:59 PM.
#3
I also looked everywhere online for that part but i wasnt able to find it. ANd can you help me try to find it and if you could please tell me what the MAS Unit is for and what does it do? This would be alot of help because for months i couldnt solve this problem and plus the mechanics i sent it too werent sure what was wrong with it,
thanx alot
thanx alot
#4
http://search.ebay.com/search/search...MAS&category0=
Here is a quick Ebay listing of w124 MAS units. I got a used one from a seller in Germany. So far, so good. The MAS unit contains our fuel pump relay, MAS, and other related electronics. I am not saying that this is definately what is wrong with your car, but it is possible your MAS unit has gone bad.
Here is a quick Ebay listing of w124 MAS units. I got a used one from a seller in Germany. So far, so good. The MAS unit contains our fuel pump relay, MAS, and other related electronics. I am not saying that this is definately what is wrong with your car, but it is possible your MAS unit has gone bad.
#5
http://search.ebay.com/search/search...MAS&category0=
Here is a quick Ebay listing of w124 MAS units. I got a used one from a seller in Germany. So far, so good. The MAS unit contains our fuel pump relay, MAS, and other related electronics. I am not saying that this is definately what is wrong with your car, but it is possible your MAS unit has gone bad.
Here is a quick Ebay listing of w124 MAS units. I got a used one from a seller in Germany. So far, so good. The MAS unit contains our fuel pump relay, MAS, and other related electronics. I am not saying that this is definately what is wrong with your car, but it is possible your MAS unit has gone bad.
#7
thanx
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#8
I would definitely explore other potential (read: cheaper) causes before throwing this part at it. As you can see here, this part is very expensive:
http://catalog.worldpac.com/mercedes...S+Control+Unit
I got a rebuilt one from a place called pelican parts. It solved a cold start problem for me, but did not help with a hesitation issue I have (that sounds pretty similar to yours, but occurs betwee 1,000 and 2,500 RPM).
DEFINITELY have the car carefully inspected for vacuum leaks. I still think a vacuum leak might be my problem even though I've had 2 mechanics look for one using smoke machines. I suspect that it's somewhere difficult to find.
My next suspect is my catalytic converter since my car was running super rich for a while when my fuel distributor was bad.
Good luck, don't throw parts at it. Check every single cheap thing first before doing anything expensive.
http://catalog.worldpac.com/mercedes...S+Control+Unit
I got a rebuilt one from a place called pelican parts. It solved a cold start problem for me, but did not help with a hesitation issue I have (that sounds pretty similar to yours, but occurs betwee 1,000 and 2,500 RPM).
DEFINITELY have the car carefully inspected for vacuum leaks. I still think a vacuum leak might be my problem even though I've had 2 mechanics look for one using smoke machines. I suspect that it's somewhere difficult to find.
My next suspect is my catalytic converter since my car was running super rich for a while when my fuel distributor was bad.
Good luck, don't throw parts at it. Check every single cheap thing first before doing anything expensive.
#9
True, but for the 76$ US I paid for my used MAS, I'd say it was worth throwing the cash at the car. I mean, If I can pay for it :P its not too expensive. But you are right, he should have another mechanic give it a going-over to be sure of what he will need.
#10
http://cgi.ebay.com/ebaymotors/merce...spagenameZWDVW
#11
Senior Member
Joined: Jun 2007
Posts: 266
Likes: 0
From: Cambridge, Ontario
95 E320 Coupe, Diesel Golf
Do you warm up the car before you drive it?
I had same problems, in the winter time, when the engine is cold, almost looks like the transmission wont kick in,, but I sprayed mafs with some carb cleaner and let the car warm up a little bit, then it seemd to be ok... For how long who knows..
I had same problems, in the winter time, when the engine is cold, almost looks like the transmission wont kick in,, but I sprayed mafs with some carb cleaner and let the car warm up a little bit, then it seemd to be ok... For how long who knows..
#12
Do you warm up the car before you drive it?
I had same problems, in the winter time, when the engine is cold, almost looks like the transmission wont kick in,, but I sprayed mafs with some carb cleaner and let the car warm up a little bit, then it seemd to be ok... For how long who knows..
I had same problems, in the winter time, when the engine is cold, almost looks like the transmission wont kick in,, but I sprayed mafs with some carb cleaner and let the car warm up a little bit, then it seemd to be ok... For how long who knows..
#13
Benz, that appears to be the right part, but not of the latest part# series.
Here is the seller I used: http://www.amg340te.de/
It took a while to get to me, but I DID order it right before christmas, and chose the cheapest/slowest shipping, but, the seller was very pleasant and gave me a good feeling to do business with.
These I believe are the MAS part# from every series that work for our 300ce 24v cars
0115458332 , 0115458232 , 0085458432 , 008545 8532 . 0125454832
I got a 0125454832 from AMGte
Here is the seller I used: http://www.amg340te.de/
It took a while to get to me, but I DID order it right before christmas, and chose the cheapest/slowest shipping, but, the seller was very pleasant and gave me a good feeling to do business with.
These I believe are the MAS part# from every series that work for our 300ce 24v cars
0115458332 , 0115458232 , 0085458432 , 008545 8532 . 0125454832
I got a 0125454832 from AMGte
#14
MBWorld Fanatic!
Joined: Dec 2006
Posts: 1,038
Likes: 0
From: Bellevue, NE
1995 E320 SE, 162,000 Miles (Sold) 2007 CLK350 Cabriolet 2014 ML550
That thing you're holding in the pic looks a lot like the remains of a Hot Film mass air flow sensor to me. If it is, it won't run worth a crap like that.