I had the 2-3 shift problem but not as severe as your's in our E420 several years ago. Symptom was that if you let off the gas just before the shift it would do a hard shift with a pronounced bang into 3rd. It turned out to be a solonoid valve. I don't remember the exact cost but it was in the $500 - $700 range. Dealer labor was $125/hr.
Transmission Woes - Dealer Needed?
I have issues with my 97 E420 transmission. The 2-3 and 3-4 upshifts are malfunctioning. When it is time for the upshift, the gear disengages and the next gear does not engage unless you let way off the throttle, at which time it goes smoothly into gear. If you have a little throttle on it [any more than maybe 5%] it will clunk into next gear. If you have more than maybe 15% throttle it just free revs until you let off. I've exchanged the fluid and used the correct [orig 722.6 fluid] as opposed to the newer fluid.
Seems to me there may be a problem here with the 2-3 and 3-4 upshift solenoid valves [?]. It looks like there are lots of codes for this from looking at the sticky on codes. Are they dealer only readable? If so, I'll pony up for a diagnosis.
Anyone know the price on these solenoid valves? Got to be less than a new or rebuild trans.
thanks
todd
97 E420
Seems to me there may be a problem here with the 2-3 and 3-4 upshift solenoid valves [?]. It looks like there are lots of codes for this from looking at the sticky on codes. Are they dealer only readable? If so, I'll pony up for a diagnosis.
Anyone know the price on these solenoid valves? Got to be less than a new or rebuild trans.
thanks
todd
97 E420
1 - 17 of 17 Posts
Thanks
I'm hoping to 'only' drop $1K or so on this transmission vs. getting a rebuild which would be at least 3x that.
todd
97 E420
I'm hoping to 'only' drop $1K or so on this transmission vs. getting a rebuild which would be at least 3x that.
todd
97 E420
It's
O something early and Iv'e been up most of the night working on The rally car,so my mind is tired.97 722.6 fly by wire throttle?Did you try a readapt of the trans to factory shift points?Have you double checked critical fluid level at operating temp?
:bowdown:
Going to catch a few hour sleep now,while everyone heads off to the salt mines
:bowdown:
O something early and Iv'e been up most of the night working on The rally car,so my mind is tired.97 722.6 fly by wire throttle?Did you try a readapt of the trans to factory shift points?Have you double checked critical fluid level at operating temp?
:bowdown:
Going to catch a few hour sleep now,while everyone heads off to the salt mines
:bowdown:
ohlord
Do you mean the adaptation reset procedure ? Ignition, gas pedal, ignition, wait 2 minutes . .
Done that and it has no effect on the slip/clunk operation.
My OBDII reader says no codes.
thx
todd
97 E420
Do you mean the adaptation reset procedure ? Ignition, gas pedal, ignition, wait 2 minutes . .
Done that and it has no effect on the slip/clunk operation.
My OBDII reader says no codes.
thx
todd
97 E420
Re check
fluid level at operating temp in park engine running.
:bowdown:
fluid level at operating temp in park engine running.
:bowdown:
I had the exact same problem with my 97 E420 and found a really cheap fix thanks to Moyada in this thread: http://www.benzworld.org/forums/w210-e-class/1238434-722-6-transmission-rpm-sensor-problem.html
Here is a quote from that thread:
Found the fix another way! There's a spring that breaks in the valve body. It actually collapses in on itself, usually. The spring is available from trans parts shops. Sonnax Part number 68942-01.. Regulating Pressure Control Valve Spring. ***Fits '99 and earlier only****. Just drop the pan, and remove the rear v/body plate on the exhaust pipe side toward the rear. Count 3 valves in, and there the spring is. If it's still all together, but collapsed, just replace it. If parts of it are missing, you'll need to remove v/body to find the missing broken bits of spring. Then reassemble, and have the fault codes cleared. Worked for me.
I ordered the spring (cost $1.74 plus shipping), I had the tech replace it while doing a fluid and filter change. My spring was actually broke in half. Put it back together with the new spring and car shifts like new now. Hope this helps.
Jaybar
Here is a quote from that thread:
Found the fix another way! There's a spring that breaks in the valve body. It actually collapses in on itself, usually. The spring is available from trans parts shops. Sonnax Part number 68942-01.. Regulating Pressure Control Valve Spring. ***Fits '99 and earlier only****. Just drop the pan, and remove the rear v/body plate on the exhaust pipe side toward the rear. Count 3 valves in, and there the spring is. If it's still all together, but collapsed, just replace it. If parts of it are missing, you'll need to remove v/body to find the missing broken bits of spring. Then reassemble, and have the fault codes cleared. Worked for me.
I ordered the spring (cost $1.74 plus shipping), I had the tech replace it while doing a fluid and filter change. My spring was actually broke in half. Put it back together with the new spring and car shifts like new now. Hope this helps.
Jaybar
Thanks and Very Interesting. Wouldn't that be a kick! A $1.70 spring . . .
Wish I had read this before just having the fluid exchange done. Can you reuse fluid? I only have 1k miles on this fluid.
The operating temp fluid level is good. Right at the top of the band.
todd
97 e420
Wish I had read this before just having the fluid exchange done. Can you reuse fluid? I only have 1k miles on this fluid.
The operating temp fluid level is good. Right at the top of the band.
todd
97 e420
"Fluid exchange" ? Please clarify
Please clarify what you mean by "fluid exchange" ?
did a MB dealer or MB indie do this for you ?
or was this a general service and/or tranny shop ?
The wrong type of "fluid exchange" and/or the wrong fluid - either could have kicked up some part (if not all) of the bad mojo here.
Inquiring minds seek to know more..
Please clarify what you mean by "fluid exchange" ?
did a MB dealer or MB indie do this for you ?
or was this a general service and/or tranny shop ?
The wrong type of "fluid exchange" and/or the wrong fluid - either could have kicked up some part (if not all) of the bad mojo here.
Inquiring minds seek to know more..
It was an MB indie and I supplied the correct 722.6 fluid. They got approx 9 liters in it since they drained the torque converter in addition to the pan. I hope that with careful attention to keeping it clean, you can reuse the 3-4 that would be dropped out with the pan. I've ordered the Sonnax 'solenoid pressure regulator spring' and will have a diff indie look at getting it in there. Fingers crossed . . .
thx
todd
97 e420
thx
todd
97 e420
I had my Saab indie replace this spring and the trans is fine now! The shifting is good. The pressure regulating spring was broken and shortened by having screwed in on itself, which seems to account for the condition seeming to slowly worsen over the last few months, going from only a 3-4 upshift issue [when I bought this car] to also a 2-3 slip issue.
A Mercedes indie told me [and dealer told the PO] the trans was toast and needed to be replaced.
$10 part delivered and $80 labor and I'm a happy driver.
thanks for the effort relaying your past experiences . . .
todd
97 e420
A Mercedes indie told me [and dealer told the PO] the trans was toast and needed to be replaced.
$10 part delivered and $80 labor and I'm a happy driver.
thanks for the effort relaying your past experiences . . .
todd
97 e420
I wonder - did the Indie offered to take the car off your hands for a lowish price? I had a similar experience on a 190E I owed. The first Indie said that engine had reached the end of it's life and would cost about $5,000 to fix. He however offered to buy to buy the car for about $1,000, since he could use it for parts. The second Indie correctly identified the problem and fixed it by replacing the top gasket and doing a top overhaul for about $1,000. The engine ran perfectly for another 60,000 miles until the car was written off in an accident.A Mercedes indie told me [and dealer told the PO] the trans was toast and needed to be replaced.
$10 part delivered and $80 labor and I'm a happy driver.
thanks for the effort relaying your past experiences . . .
todd
97 e420
My feeling is that the first guy exactly knew what the problem was and was looking at making a quick buck by buying cheap, fixing it and selling again.
I think the indie just didn't know about this. Should have, though. Dealer too. I looked through the records from the PO and now see that both the dealer and coincidentally this same MB indie told the PO he would have to replace the trans. He unloaded it on me for an 'adjusted' price rather than do the trans. I'm the lucky guy here benefitting from the knowledge of others here.
thx
todd
97 e420
thx
todd
97 e420
I have a 97 E320, and What's the procedure to reset the computer for the tranny? (pedal, key, pedal????)
Welcome to the forum. Please click the User CP link and complete your BW profile re: vehicle and location as that is quite often useful information.I have a 97 E320, and What's the procedure to reset the computer for the tranny? (pedal, key, pedal????)
FWIW, the Help/DIY stickies atop this forum and the clever use of the search function will answer about 90% of the questions you will have with your car...including this one. In the spirit of teaching you to fish, having baited your hook, I'll let you toss in the line.
Take care and enjoy the ride,
Greg
2001 E 320 4 Matic - Can be use the same springs as mentioned in the thread? I thought it said it is not for model years later than 1999.
Thanks
Thanks
1 - 17 of 17 Posts
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