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DIY Side mirror rubber seal fix for late model W140's

33K views 24 replies 8 participants last post by  daidnik  
#1 ·
This is a DIY to replace the side view black rubber mirror seals, but this only applies to the 2nd generation mirrors with black rubber seal between the mirror, and the body of the car.

Just so everyone knows. The mirror seals are available from the dealer to the tune of about $700.00 USD EACH. Yea, a little cheap !!! It includes the whole mirror mechanism for free! Meaning one has to buy the whole mirror mechanism to get the side mirror seal. The seal are not sold separately. If the seal lasted like a fender, I’d justify the purchase, but it is made from rubber that deteriorates over time.

In the case of my S320, the seal has just cracked-up like saltine cracker. Consequently, it just looked awful. It was an eye sore, but $1400 is just not an answer, so I’ve strived for a real solution. I went to the junk yard to tinker with mirrors form other Mercedes vehicles, and I found that late 90’s C-Class cars have the same external mirror seal features, yet internally how the wires channeled inside is completely different from the W140 and W202.

A company in the Orient makes a new seal, yet I wanted a solution now, and did not want to wait to order a part, so for every S-Class in the junk yard five or six C-Class models are in the junk yard, so plenty of cars to choose from, and I happen to find two C-Class cars with the mirror seals in excellent shape. The seals are very easy to remove from the C-Class. The side mirrors spring forward and backwards.
To process remove the seals from the C-Class:

A – Bend the mirror backwards
B – Remove the bottom Philips screw
C – Remove the remaining screws, yet move the mirror forward to access the screws
D- Cut the wires from the base
E-Pull the seal from the mirror

I found the C-Class seals from the junk yard at several dollars each.. Much better than $700

The process to transplant the C-Class mirror seal to the S-Class mirror takes a handful of hours per mirror, but the process may make some of you cringe. I cannot be responsible if you goof-up your mirrors. I have detailed the process with fifty-photos to show every little step. I performed the seal swap on a 1996 S320 and 1998 S500. The mirrors are mechanically the same, but electrically the mirrors are different. The S500 has two extra wires, and the connector in the mirror is different, but the connector on the outside of the mirror is the same on both models.

I have about ten posts to post, so please wait for your comments and questions.

Thank you,

Martin

PS. Here is how the mirror assembly is removed from the car-See the first post of the link below:

http://www.benzworld.org/forums/w140-s-class/1406221-diy-smoke-mirrors-revisited.html
 

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#12 · (Edited)
Last picture...

If the process is too difficult for you to handle, and you’re interested in fixing the eye sore. I will repair both mirrors for $140.00 including shipping back to you in the USA. Just provide me the seal. If your mirrors pop a fuse when you fold them from the center counsel, the wiring inside the mirror is bad. I will repair that too for an additional $40.00 for both mirrors. Just PM me if you want me to repair your mirrors.

Martin
 

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#14 ·
Mava,

Great DIY. Will any W202 front door mirror seals work for this mod to use on late W140? I see Ebay vendor selling new pair replacement seals for W202, listing P/N's A202-811-0598, A202-811-0698. It looks like the only P/N that I can more of less read on your pics is slightly different in the leading digits of the last four digits; probably something like elec conn variants or something. EPC is no help as these seals are not sold as individual parts, but conveniently packaged with mirror included as an assy.

I have sent message to ask Ebay seller about external form & 3X screw hole mount with late W140, but I may not get a constructive answer from that.

I figured to give you a try as you have direct experience.
 
#19 ·
On the S320's you are missing two or three wires in the mirror. You would have to see if your harness (coming from the door) is populated with the wires like in photo 26... These pictures were done from a 98 S500 if you are missing the wires from the door it will not work if the wires are there. You will just need the mirror harness from a 500/600 car, or the whole mirror, but when I did my S320 after this write-up it was missing the heater wires...

Martin
 
#20 · (Edited)
I did this over the last 2 days on my passenger side. This guide is still spot on, but thought I could add some new pictures and thoughts..

My car is a 99 CL500. All the wiring, fortunately was in great shape and I only had to work on the gasket.

Bought my gasket from Autohausaz.com P/N 2108106816G. The gasket was a perfect fit! Wiped it down with some Auto Glym before I installed it.

That third screw in the bottom is a real pain to get to without removing the mirror housing. A combination of screwdrivers helped remove it. Ended up bending a small one in my Vice to get it back on.

I added some clear pictures if the wiring for reference, worked out just fine with a regular paperclip, didnt need to sharpen the end. I bought the gasket maker at Harbor Freight tools. Used some exact knives to make the 3 holes. Took the screws and pushed them through both the old and new gasket to line everything up. If I didn't want to get it finished so bad, I would consider adding more gasket maker to the holes once the wires are in place too, that would really seal or all up.

Hope pictures can add to the tutorial.

This a very capable project for the average person with instant and noticeable results. Just go slow and follow the original write up, make sure you have small screwdrivers handy
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#22 ·
This is a DIY to replace the side view black rubber mirror seals, but this only applies to the 2nd generation mirrors with black rubber seal between the mirror, and the body of the car.

Just so everyone knows. The mirror seals are available from the dealer to the tune of about $700.00 USD EACH. Yea, a little cheap !!! It includes the whole mirror mechanism for free! Meaning one has to buy the whole mirror mechanism to get the side mirror seal. The seal are not sold separately. If the seal lasted like a fender, I’d justify the purchase, but it is made from rubber that deteriorates over time.

In the case of my S320, the seal has just cracked-up like saltine cracker. Consequently, it just looked awful. It was an eye sore, but $1400 is just not an answer, so I’ve strived for a real solution. I went to the junk yard to tinker with mirrors form other Mercedes vehicles, and I found that late 90’s C-Class cars have the same external mirror seal features, yet internally how the wires channeled inside is completely different from the W140 and W202.

A company in the Orient makes a new seal, yet I wanted a solution now, and did not want to wait to order a part, so for every S-Class in the junk yard five or six C-Class models are in the junk yard, so plenty of cars to choose from, and I happen to find two C-Class cars with the mirror seals in excellent shape. The seals are very easy to remove from the C-Class. The side mirrors spring forward and backwards.
To process remove the seals from the C-Class:

A – Bend the mirror backwards
B – Remove the bottom Philips screw
C – Remove the remaining screws, yet move the mirror forward to access the screws
D- Cut the wires from the base
E-Pull the seal from the mirror

I found the C-Class seals from the junk yard at several dollars each.. Much better than $700

The process to transplant the C-Class mirror seal to the S-Class mirror takes a handful of hours per mirror, but the process may make some of you cringe. I cannot be responsible if you goof-up your mirrors. I have detailed the process with fifty-photos to show every little step. I performed the seal swap on a 1996 S320 and 1998 S500. The mirrors are mechanically the same, but electrically the mirrors are different. The S500 has two extra wires, and the connector in the mirror is different, but the connector on the outside of the mirror is the same on both models.

I have about ten posts to post, so please wait for your comments and questions.

Thank you,

Martin

PS. Here is how the mirror assembly is removed from the car-See the first post of the link below:

DIY Smoke and Mirrors Revisited!
what is the name of the company in the orient
 
#23 ·
Below is link to one.


It is important to verify that EPDM rubber is used to mold the seal. EPDM has good UV, oxidative & ozone resistance for exterior weather resistance.

This unit identifies matl in mold tooling.
 
#24 ·
You are dead-on right EPDM, and these rubber seal company has ventured onto ebay, yet it still comes from Taiwan.

Now, this is worth the total gamble even if it is not EPDM.


For some reason URO parts has not figured it the basically the same mirror seal for the W140 and all of the 90's E-class too. For $13 well worth the risk, and one can use "Aerospace Protectant" a few times a year to get that UV protection, or the Gummi stuff the BMW guys use too. The Aerospace stuff is available at Napa for like $15 for 15oz or $60 for gallon on ebay or Amazon



I use it on all door seals, trunk seals, sun roof seal, mirror seals, and etc...


what is the name of the company in the orient
I'd try the W202 seal from AutohausAZ as they are they are similar like in post 1 as the W140, but the link daidnik provided id a plug n play part the W202 part one has to modify a them.

Hope it helps,

Martin
 
#25 ·
URO Parts & rubber is a bad combo IMO.

Rubber technology is a very under-appreciated 'dark art'.

There are so many different types for different applications and each type is a mix of a dozen-ish ingredients and processing/mixing details and that's even before vulcanization and aside from durometer spec (hardness/softness). There are so many ways to go wrong with rubber.