That trans LIKE all MB transmissions HAVE a park/reverse lock-out that is DESIGNED to keep that from happening.

ONCE a car reaches 5 MPH that lock-out keeps the internal linkage from moving past Neutral.

Never heard OF any MB trans ever allowing that to happen!

__________________
MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
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44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
Retired Moderator

My lock-out works perfectly. I've tested it in the driveway at very low speeds (by accident, a time or two) and it's kept the thing out of reverse every time.

__________________


~Michael S.~
Past cars:

1986 300SDL
1987 300SDL
1982 240D
1982 300SD


Current:

1987 300SDL

Is it possible that I damaged something in the wreck when it all shifted forward? I notice that you stated that the feature was internal but I am unfamiliar with the workings of this car.

I know that the shifter went forward and I reacted very quickly with the brakes and moving the shifter back.

Is it possible that I just locked-up my brakes and the tranny was never compromised?

Even if that is the case I still stand by what I said. Why don't all cars have this lock-out feature?

__________________
1993 W124 300D
-297K on the clock as I type this.

So you can't move the shifter to reverse if going over 5mph? Even from neutral? Hmmm....I am not brave enough to try it....anyone else want to give it a try?

__________________
-diesel is not just a fuel, its a way of life-
'15 GLK250 Bluetec 118k - mine - (OC-123,800)
'17 Metris(VITO!) - 37k - wifes (OC-41k)
'09 Sprinter 3500 Winnebago View - 62k (OC - 67k)
'13 ML350 Bluetec - 95k - dad's (OC-98k)
'01 SL500 - 103k(km) - dad's (OC-110,000km)
'16 E400 4matic Sedan - 148k - Brothers (OC-155k)

not many i will tell you that. when my dad was a kid his mom, my grandmother had a 1967 camaro R/S. while driving on the highway his little brother, my uncle crawls up front and hits it into reverse killing the tranny instantly. I saw pictures of it and lets just say it was a shame. not a mercedes but i would take it if it was givin to me. So may it rest in peace.

__________________
http://i148.photobucket.com/albums/s...titled-1-3.jpg
1981 300d

I've done it several times. Tested it at 5 once. Didn't budge. So I got going on the driveway about 20 or so, maybe 25, and very, very, very, nervously and gently leaned on reverse... ready to yank it back down into drive.

My safety factor was that since we got it, when you click it in reverse, it takes about 1/2 a second for everything to shift over and lock into reverse gear after the lever hits R - so I figured that half second was my margin to be wrong and jerk it back into park.

It passed the test, I went all the way up the driveway in neutral, leaning fairly hard on reverse... never budged.

I knew my thingie worked at 5 mph though, i'd NEVER advocate testing it unless you already knew it worked.

__________________


~Michael S.~
Past cars:

1986 300SDL
1987 300SDL
1982 240D
1982 300SD


Current:

1987 300SDL

I think I may try that too....I'll go down our street tomorrow at 5-6 mph....how do you know you're going 5 though? it doesn't even register till 10....oh well I'll get to 10 then back off a little and try it....I will quickly try to push on it ready to pull it back instantly. Mine takes about 2.5 seconds to enter reverse, so thats enough time.....I'd like to know if mine works properly too.....

I know! I'll do it on snow! So if it does lock the wheels it won't damage anything! Snow/ice can be a good thing!

__________________
-diesel is not just a fuel, its a way of life-
'15 GLK250 Bluetec 118k - mine - (OC-123,800)
'17 Metris(VITO!) - 37k - wifes (OC-41k)
'09 Sprinter 3500 Winnebago View - 62k (OC - 67k)
'13 ML350 Bluetec - 95k - dad's (OC-98k)
'01 SL500 - 103k(km) - dad's (OC-110,000km)
'16 E400 4matic Sedan - 148k - Brothers (OC-155k)

I found the speed by just crawling, literally barely moving... and just like when you back into your parking space, if you're rolling slightly, the interlock doesn't keep you out of reverse. Then, I crawled slightly faster and tested it... then I crawled slight faster still and tested it... and somewhere +/- 5 I found the spot where it started preventing Reverse.

Be careful out there, not worth tearing up a transmission to test an interlock. Probably get away with it but don't try anything too fancy

__________________


~Michael S.~
Past cars:

1986 300SDL
1987 300SDL
1982 240D
1982 300SD


Current:

1987 300SDL

yea.. I was questioning this thread.. I think most if not all transmissions have them. they tried it on mythbusters.. remember!

I don't try to kill transmissions just for fun...but I am pretty sure that none of the other four in our fleet (all Fords) do that. I think they'll let you kill it if you want to.

I know older Chryslers will let you jam it all the way through reverse up into park if you want to, my grandmother proved that one.

__________________


~Michael S.~
Past cars:

1986 300SDL
1987 300SDL
1982 240D
1982 300SD


Current:

1987 300SDL

My fiance's old '93 buck century would let you shift when over 5mph from drive to reverse and vice versa.....our minivan also lets you do it. The interlock to keep it in park unless you press the brake doesn't even work.


Our whole street is snow...so I will try it today going 5-6mph....no way it will hurt it....the rear wheels will just slide if it stops them...so very little force.

__________________
-diesel is not just a fuel, its a way of life-
'15 GLK250 Bluetec 118k - mine - (OC-123,800)
'17 Metris(VITO!) - 37k - wifes (OC-41k)
'09 Sprinter 3500 Winnebago View - 62k (OC - 67k)
'13 ML350 Bluetec - 95k - dad's (OC-98k)
'01 SL500 - 103k(km) - dad's (OC-110,000km)
'16 E400 4matic Sedan - 148k - Brothers (OC-155k)

Just for the record, AFAIK it only prevents going from D/N to R and not the other way around. You can go from R to any other gear effortlessly.

__________________


~Michael S.~
Past cars:

1986 300SDL
1987 300SDL
1982 240D
1982 300SD


Current:

1987 300SDL

It sounds like the whole drive train is out of whack, I'd be afraid of moving it into the garage, let alone going down the highway.

Before the drive shaft comes apart you better park it and fix it, or junk it. Once the drive shaft lets go its scrap.

__________________
1999 SL500
1969 280SE
2023 Ram 1500
2007 Tiara 3200

Well the only reason that is ok, is because park and reverse do not have clutches, infact park has a pin! if you shove that tranny into park going 70 youl definitly be bending something. but, if your going from reverse to drive thats fine, it engages the clutches for first or second gear those are made to slip.

__________________
Have you ever noticed that anybody driving slower than you is an idiot, and anyone going faster than you is a maniac?

As long as they would add one additional commandment for you to keep thy religion to thyself.
George Carlin (Wonder where he is now..)

1981 240d (engine donor 1983 240d) recently rebuilt engine hurray! - No more.. fought a tree and the tree won.

pearl black 1983 240d 4speed (Converted!@$$%) atleast the tranny was rebuilt.

I am pretty sure that my wheels locking up were the result of me slamming on the brakes after I heard my shifter move as my dog plopped down on the console. It probably only moved laterally but based on the way my dog hit it I assumed it went forward so I (over) reacted.

I know that as a result of everything shifting forward my shifter is bent in a way that prevents the position indicator from being accurate and from park being fully engaged.

I have driven it about 300 miles since I put everything back together with no problems. Definitely not scrap. Flex discs will be here shortly and I will install them immediately.

__________________
1993 W124 300D
-297K on the clock as I type this.