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| Otiswesty Administrator Date registered: Jun 2007 Location: Portland, Oregon Vehicle(s): 463.241, 461.213 Posts: 3005  | Transmission rebuild I have a 1999 G500 with 120K miles on it. I got the truck with 84K miles and it has been a great problem free driver. A few weeks ago I took it into the dealer for a 60K mile service including new plugs, trans flush, and service A. A week and a half later I came out of work, started the truck up and it would not go into gear. it was also running at rough high idle. Towed it back to the dealer and got quoted $5800 for a Mercedes rebuilt trans including torque convertor, plus labor. I opted to have them send the box down to Sun Valley Mercedes Transmissions in Van Nuys CA. They are $2000 for a rebuild including the torque convertor, plus shipping each way. Dealer will be discounting the labor as the temporal relation to the trans service is a glaring issue with me. The question I have is whether a trans flush or pressurized flush of some sort could lead to this kind of failure? I have offroaded in it using full torque creeping on slickrock lately and every now and then will tow a tractor with mower (7000#) to my forestry property. I think the rough idle was the car in gear with issues despite being in "P." When we towed it out of the structure, it could drive forward in "N," but was in not in gear in "D" and the 1-4 gear positions. The carnage: Edited by otiswesty 8/25/2015 8:20 PM (gear train.jpg) Attachments ----------------  gear train.jpg (292KB - 0 downloads) | |
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| DUTCH Administrator Doppelgänger Date registered: Apr 2006 Location: US, GA, Atlanta Vehicle(s): 2015 Audi Q7 3.0 TDI,2018 Sprinter Posts: 9963  | ||
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| Braingears Expert Date registered: Apr 2006 Location: St Petersburg, FL Vehicle(s): G320 & ML320 Posts: 1450  | ||
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| Aircruiser Extreme Veteran Date registered: Aug 2011 Location: Atlanta GA Vehicle(s): 2000 G500, 1986 300GD, 2017 Porsche Cayenne Hybrid Posts: 364  | ||
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| NYG500 Member Date registered: Aug 2014 Location: NJ/NY Vehicle(s): 2007 G500 Posts: 43  | ||
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| or_550i Veteran  Date registered: Oct 2010 Location: Portland, OR Vehicle(s): 1984 280GE Europa, 2003 G500 Posts: 264  | ||
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| Otiswesty Administrator Date registered: Jun 2007 Location: Portland, Oregon Vehicle(s): 463.241, 461.213 Posts: 3005 | ||
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| Otiswesty Administrator Date registered: Jun 2007 Location: Portland, Oregon Vehicle(s): 463.241, 461.213 Posts: 3005 | ||
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| Braingears Expert Date registered: Apr 2006 Location: St Petersburg, FL Vehicle(s): G320 & ML320 Posts: 1450 | ||
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| Otiswesty Administrator Date registered: Jun 2007 Location: Portland, Oregon Vehicle(s): 463.241, 461.213 Posts: 3005 | ||
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| atg Veteran Date registered: Nov 2014 Location: Los Angeles Vehicle(s): 2005 G55, 1985 300tdt Posts: 129 | ||
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| Otiswesty Administrator Date registered: Jun 2007 Location: Portland, Oregon Vehicle(s): 463.241, 461.213 Posts: 3005 | RE: Transmission rebuild The transmission has gone back in. The small main seal leak is fixed and hooray the intermediate shaft CV joints look perfect (with new grease). I should be getting big blue back next week.  Edited by otiswesty 9/4/2015 1:49 AM | |
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| Otiswesty Administrator Date registered: Jun 2007 Location: Portland, Oregon Vehicle(s): 463.241, 461.213 Posts: 3005 | RE: 1999 G500 Transmission rebuild So, I have been having a few issues since picking up the G in early September. The G drives and shifts perfectly, but occasionally will not start in P. When I went to pick it up after the trans replacement, I was waiting for an eternity and finally they came out and said they could not start the vehicle. It had been sitting for 2 weeks waiting for the trans to be returned, but was test driven earlier that day. I guess they got it going, because it was out front about 15 minutes later. I drove it home without trying to show much concern. The mat behind the front seats had clearly been pulled and hastily replaced, I guess they must have been surprised to not find the battery there. I had been planning on eventually replacing the current water filled battery that was installed by Europa or some previous owner. The truck had been sold under contract by Europa last in late 2010. A couple days later, I had a no start in the garage before work. I fiddled around a bit with the shifter and discovered that it would start in "N" but not "P." This intermittent no start in "P" continued on and off seemingly randomly. Not really being sure what was going on, I ordered a new battery at the dealer and replaced the old (age unknown) battery with a new AGM Mercedes battery. There was no change in the starting issues. still on starting seemingly randomly. I had also ordered a new shifter thinking that there may be a relationship between the shift position sensor and the non-start issue. Previously in 2012, I had replaced parts number 280 290 and 330 on this parts diagram. At the time, I had multiple issues including a reverse switch failure, buggered up shift numbering, and a degraded shifter shutter. It was a real beauty after that and everything worked great. Part 280 has teh reverse switch and also has the shift indicator switch and thus is only 3-3 1/2 years old right now. Not sure if the problem was related to additional problems with the shifter, but I decided I would be better off replacing it myself at wholesale parts cost rather than take the G back into the dealer and pay full retail for a likely dealer replacement of this unit. So, I have had this sitting on my workbench for the last 6 weeks. When I replaced the battery a couple of weeks ago, I noticed the ground strap was looking a little rough. I ordered up a new one and I took some time this nice weekend to replace it with the MB supplied new part yesterday afternoon. This morning the G will not start at all. Time to finally replace the shifter, I thought. I got the shifter in after a bunch of mucking about. Still no start. I pulled and cleaned all the contact surfaces on the ground strap. I have 12v+ at the battery, same under the hood. I swapped out the K40 relay with a used spare I have just in case, but it made no difference. Scratching my head here. Please advise if you have any ideas. (Shift_Lever.jpg) Attachments ---------------- Shift_Lever.jpg (298KB - 0 downloads) | |
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| AlanMcR Expert Date registered: Apr 2006 Location: US, CA, Los Altos Vehicle(s): G300DT E300DT 230SL Posts: 3500 | ||
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| Otiswesty Administrator Date registered: Jun 2007 Location: Portland, Oregon Vehicle(s): 463.241, 461.213 Posts: 3005 | ||
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| Roly Elite Veteran Date registered: Apr 2006 Location: Australia Vehicle(s): 1999 G500 Posts: 661  | ||
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| DUTCH Administrator Doppelgänger Date registered: Apr 2006 Location: US, GA, Atlanta Vehicle(s): 2015 Audi Q7 3.0 TDI,2018 Sprinter Posts: 9963 | RE: Transmission rebuild otiswesty - 11/30/2015 2:40 AM When I was checking out the tranny after putting everything back together this evening, I pulled the large round multi-pin plug that locks into it. It looked like there was some significant ATF contamination. I was reading on Benzworld just now about ATF seepage past the O-rings here and the potential for fluid to wick up the cable and damage the Transmission Control Module. Hopefully this is not the case. As the vehicle does not start, I may just tow it back in. First I would like to pull the TCM and see if it is flooded with ATF. I am not sure if this in the electronics box under the hood? Item #32 in the attached parts diagram. (Image1.jpg) Attachments ---------------- Image1.jpg (93KB - 1 downloads) | |
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| DUTCH Administrator Doppelgänger Date registered: Apr 2006 Location: US, GA, Atlanta Vehicle(s): 2015 Audi Q7 3.0 TDI,2018 Sprinter Posts: 9963 | RE: 1999 G500 Transmission rebuild AlanMcR - 11/29/2015 10:59 PM The first thing I would do is to make sure the fat +12 to the starter is tight. Might want to clean and re-install it. Failing that, drop the fuse box and find the two large red wires (~5mm copper). These supply most of the +12 to the rest if the circuitry. Check that they are tight, have 12V, and that the 12V stays when you try to crank. The loose large red wire (lower green arrow) put me at the side of the road in Nebraska. It was a faulty crimp to the end O-stud, not a loose hold down nut. Somebody had messed with it after it left the factory. (WireProblem2.jpg) Attachments ---------------- WireProblem2.jpg (387KB - 0 downloads) | |
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| Aircruiser Extreme Veteran Date registered: Aug 2011 Location: Atlanta GA Vehicle(s): 2000 G500, 1986 300GD, 2017 Porsche Cayenne Hybrid Posts: 364 | ||
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| Otiswesty Administrator Date registered: Jun 2007 Location: Portland, Oregon Vehicle(s): 463.241, 461.213 Posts: 3005 | ||
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