jeremy5848

I need to hear from all on this forum or their friends whose '95 E300 diesel or very late production (~May 1993) 300D2.5 had a cracked/leaky monovalve (001 830 40 84). I need the VIN of the car that had the problem.

Having replaced my leaky monovalve three times with no success, today (11-07-2013) I met with the service manager and zone rep for Mercedes-Benz of Santa Rosa (California). Nice meeting, both were professional and understanding, agreeing that there must have been something wrong with the plastic when the monovalve/pump for the '95 E300 was made. Both agreed that telling customers to buy a $20 "radiator repair" kit at Cheapie Joe's Auto Parts was not an option. (That's what I finally did to fix my leak.)

"What to do" was the big question. They finally decided that the service manager would file a "PTSS Report" (PTSS = Product Technical Support System) with Mercedes-Benz of North America for forwarding to Germany. I was told that such a report cannot be ignored, that a response is required. Two caveats: (1) it might take "some time" and (2) if I can come up with a list of others who have had this problem, showing that it isn't a me-only problem, the PTSS stands a much better chance of getting action.

If you or anyone you know has had this problem with this monovalve, please let me know ASAP. If you don't want to post the VIN, please send me a PM or email.

jeremy [at] cds1 [dot] net

jeremy5848

I now have five owners including myself with this same problem. The list went to the service manager at my dealer by email yesterday. He will file a PTSS Report with MBNA. Whether it will do any good is another question but at least I'll have the satisfaction of being dissed at a higher level.

1995 E300D owners with cracked/leaking monovalves

• 'Connerm' WDBEB31E6SC0828XX (Virginia) Monovalve replaced in 2008 and has not failed. "It was not cheap."
• Jane WDBEB31E4SC1396XX (California) Monovalve is cracked but not yet leaking.
• Chris WDBEB31E6SC1519XX (Ohio) Monovalve replaced twice; one replacement was purchased during a vacation trip to Germany. Owner eventually repaired the leak with glue.
• 'Zulfiqar' WDBEB31E6SC1899XX (Texas) This monovalve actually broke off at the point where others have had only a leak. The owner performed a glue repair and the monovalve is working although it still leaks a small amount.
• Jeremy WDBEB31E1SC2227XX (California) Monovalve replaced three times (twice by owner using new parts from The Classic Center in Irvine, Cal. and once by my local dealer), all unsuccessful. The original part was subsequently successfully repaired with a "radiator repair kit" purchased (US$20) from a local auto parts store and installed on the vehicle (July 2013). As of this date (November 2013) the repair is holding (no leaks).

Jeremy

jeremy5848

The list of owners with cracked/leaking monovalves has grown to six:

• ‘Connerm’ PeachParts MercedesShop Forum member in northern Virginia.

VIN WDBEB31E6SC0828XX.

• Jane, Monte Rio, California, who is a personal friend of mine and whose car has been serviced at Mercedes-Benz of Santa Rosa. The monovalve in her car is cracked but is not yet leaking.

VIN: WDBEB31E4SC1396XX.

• Chris, Oberlin, Ohio. Has had the car since September 2011 and has had two cracked monovalves. First was on the car when he bought it; second was purchased as a replacement while visiting in Germany in 2011.

VIN: WDBEB31E6SC1519XX.

• Michael, Lynnwood, Washington. His monovalve, like mine, has been replaced three times. The first two were by an independent mechanic who sourced the part from MB of Lynnwood. The third part was installed by MB of Lynnwood and it is now cracked and leaking. The picture Michael emailed me looks just like mine -- cracked in the same identical place.

VIN: WDBEB31EXSC1771XX.

• ‘Zulfiqar’ PeachParts MercedesShop Forum member in Texas.

VIN: WDBEB31E6SC1899XX.

• Jeremy, Santa Rosa, California. Owned since March 2012. Has had four (4) cracked and leaking monovalves: the one in the car when purchased, two new ones from the Classic Center, and one installed by Mercedes-Benz of Santa Rosa (California).

VIN: WDBEB31E1SC2227XX.


Remember: This problem affects only 1995 E300 diesels with combined aux pump / monovalve part number 001-830-40-84.

Rowdyxyz1953

jeremy, I have a e 300d with the same problem. Did anything become of the dealership contacting MB in Germany. I would like to fix mine if possible. My symptoms are no heat or just barely lukewarm only on the drivers side. Any help would really be appreciated!
Thanks
Scott 918 822 3077