Mercedes-Benz Forum banner

1 - 15 of 15 Posts

·
Registered
Joined
·
5 Posts
Discussion Starter #1
Driving home today, I hear a clunk in my rear end as I'm turning onto my street. Hmm, that doesn't sound right. Stop the car, crawl under the back and start looking around. I eventually find two bolts completely backed out of the drivers side axle shaft to the differential, the third is missing, and the half moon washer that they all go into is mangled. Why did this happen? I don't have easy access to a junkyard and am having a hard time locating these little bits of hardware online. I don't want to drive the car but might need to, how bad would this be? Any advice would be appreciated.
 

Attachments

·
Registered
w140 300SEL 1992, w124 500E 1991, w124 300td Turbo 1992, r129 500SL 1994
Joined
·
261 Posts
If this is (what remains of) a half-moon, there should be a second one still ON the car?
This part is the one connecting the rear wheel shaft to the differential, right?

To each his own, but I would not drive the car in that condition.
What strikes me is that these bolts are usually (well, at least on my car let's say) veeeeeeeeeeeeery difficult to unscrew, and three of yours broke down so easily? There must be another part damaged somewhere.

Jean-Louis
 

·
Premium Member
1993 300CE Cabriolet (mine) ; 1994 E320 Wagon (wife's) ; 1990 Benz 300E 2.6 (son's)
Joined
·
6,859 Posts
looks like Mercedes only sells those as part of a 'rear wheel bearing repair kit', which consists of that half moon, the bolts, the wheel bearing, circlip, and cap nut. on a M103/M104 kinda car, looks to be part 2029800016... on a 400E/E420/500E, looks to be 1299800416
 

·
Premium Member
1993 300CE Cabriolet (mine) ; 1994 E320 Wagon (wife's) ; 1990 Benz 300E 2.6 (son's)
Joined
·
6,859 Posts
oops. 320 wagon has a different PN, 1249800516

not checking every possible combination of cars.
 

·
Registered
Joined
·
5 Posts
Discussion Starter #6
Thank you guys. She's a 1992 300ce with 253000 kms. Just got it recently and am trying to catch up on stuff the previous owner neglected. But yeah, this seems like a strange failure and it makes me wonder what's wrong to cause something like this. Thanks for the p/n's. Will probably order that kit until I get time to take a closer look at the diff.
 

·
Premium Member
1993 300CE Cabriolet (mine) ; 1994 E320 Wagon (wife's) ; 1990 Benz 300E 2.6 (son's)
Joined
·
6,859 Posts
ok, I happened to leave EPC open... the 300CE-24 comes up with the A 202-980-00-16 (2029800016) PN, too.


ooof, $250 discounted for genuine benz. cheaper parts are available. YMMV.
https://www.fcpeuro.com/products/mercedes-wheel-bearing-kit-190d-190e-c220-2029800016a

note this is the wheel bearing kit, for one side, 2 kits per car. the smaller bolts hold the flange onto the hub carrier/spindle piece. the circlip holds the bearing in, and the crown nut thing goes on the end of the axle.
 

·
Registered
Joined
·
5 Posts
Discussion Starter #8
The bolts in the picture I posted need xzn sockets, correct? This is my first German car, guess I'll need some new tools.
 

·
Registered
w140 300SEL 1992, w124 500E 1991, w124 300td Turbo 1992, r129 500SL 1994
Joined
·
261 Posts
Should be XZN M10, if same as mine.
And yes, you need new tools.
Do not try with a "classic" torx, you will damage the bolt.
Such tools are only few bucks


Jean-Louis
 

·
Registered
W124
Joined
·
4,764 Posts
Just another instance of Mercedes not supporting their cars the way they used to. Anyway, just contact any junkyard selling benz parts on ebay and ask them what they want for the bolts. I'm sure they have them around or will pull them off a car for you. As for what failed, its possible they weren't torqued correctly when someone pulled the axle shaft at some point. This is not a very common occurrence. The only other failure like this happened was posted up a month or so ago.
 

·
Premium Member
About a dozen 1988, 1989, 1990, and 1991 sedans, wagons, 4Matics and 1 coupe
Joined
·
5,454 Posts
I know I have several sets of those bolts and "washers" laying around at my stash. I won't be up there until this weekend, though, and you don't say where you are located.

The only reason for those bolts to loosen is improper tightening. Some dummkopf was working back there, probably with improvised tools, and wasn't able to tighten those XZN bolts properly.
 

·
Premium Member
1993 300CE Cabriolet (mine) ; 1994 E320 Wagon (wife's) ; 1990 Benz 300E 2.6 (son's)
Joined
·
6,859 Posts
I noted in the pictures of the kit I linked the bolts had blue tips suggesting they were pre-dipped in locktite.
 

·
Registered
Joined
·
5 Posts
Discussion Starter #13
I managed to borrow the right socket from a co-worker and tightened the two bolts I had recovered and discovered two of the remaining three bolts in the axle shaft we're loose, close to being a major catastrophe. I put them in without the half moon washer as that was destroyed and am a little worried about interference without those couple of millimeters there but no issues so far.
 
1 - 15 of 15 Posts
Top