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After confirming with an EVP at PIAA that the E clip was available and would work on the W205, I received the PIAA Si-Tech wiper with E clip in the package. Unfortunately, it has no resemblance to the original clip. Also, notice the size of the bracket on the PIAA blade. Makes it a lot more rigid. Plus it is not as curved as original. I just tried the red Bon Ami on the passenger side glass to see if it makes a difference.
Yep. This will be what causes me to sell the car and not buy AMG again.
FYI - for me, the problem is gone. My impression (looking at the behavior of rain drops on the windshield) is that before delivery, they put some coating/wax/whatever on the windshield. After it was "cleaned" by the rain, the wipers started to work as they should (but bear in mind that I have C43).
Last edited by Baldur!; Nov 4, 2019 at 05:04 AM.
Reason: Added additional info about the car
I've been testing out a fix for the past month or so which has shown promise and thought I'd share. The issue likely ties back to the stiction of the rubber compound combined with the wiper arm tension (potentially why coatings make this worse).
Starting with the easy route of the wiper rubber, I looked into how to permanently soften and condition the blades - the process involved heat treating all surfaces of the blades (with a hair dryer / heat gun on low) and soaking in a rubber conditioner (like 303 Aerospace); heating between repeat treatments being the important part. The process is self explanatory but here's a video:
Result: wiper juddering has been significantly reduced in moderate to heavy rain, with slight skipping occurring only in very light rain / mist. Time will tell how permanent of a fix this is.
Word of warning if you try this...! You're going to get massive streaking the first time you reinstall and run the wipers as the contact surfaces dry out (303 doesn't naturally evaporate). Recommend you run the wipers and re-clean the windshield before you hit the road.
Excerpt from email w/EVP after sending photo of E adapter compared to original M-B clip: I've got Mercedes wiper arm part number 205-820-83-01 on order to verify adapter fitment. It's' suppose to fit C-Class 2015 - 2019 models. It will be here early next week (11/11/19). Merc is so frustrating as it seems we can't get clear data on arm types. We have an arm from a 2016 on hand and it's different than yours, yet OE parts fiche calls for the same part for 2015-2019.
On another note, using the red Bon Ami on the glass made no difference.
Excerpt from email w/EVP after sending photo of E adapter compared to original M-B clip: I've got Mercedes wiper arm part number 205-820-83-01 on order to verify adapter fitment. It's' suppose to fit C-Class 2015 - 2019 models. It will be here early next week (11/11/19). Merc is so frustrating as it seems we can't get clear data on arm types. We have an arm from a 2016 on hand and it's different than yours, yet OE parts fiche calls for the same part for 2015-2019.
On another note, using the red Bon Ami on the glass made no difference.
I have the PIAA with the E clip and it works fine with my C63S. And they do not skip at all. I resorted back to the OEM Mercedes wipers because once I cleaned the wiper blades with the Carguys spray it seemed to not skip anymore either.
Excerpt from email w/EVP after sending photo of E adapter compared to original M-B clip: I've got Mercedes wiper arm part number 205-820-83-01 on order to verify adapter fitment. It's' suppose to fit C-Class 2015 - 2019 models. It will be here early next week (11/11/19). Merc is so frustrating as it seems we can't get clear data on arm types. We have an arm from a 2016 on hand and it's different than yours, yet OE parts fiche calls for the same part for 2015-2019.
On another note, using the red Bon Ami on the glass made no difference.
Sorry the Bon Ami didn't help. Certainly you've shown there's more than one reason for wipers to skip.
From PIAA EVP:Just circling back with you. We received the C Class wiper arm today and have verified that the M base and E adapter actually do fit the 2015 - 2019 wiper arms. We are going to shoot a video tomorrow showing the installation. . . . Our marketing dept wasn't able to finish the pro-edit on the video but I just shot a few quick clips on my cell phone for your reference. The plastic sliding lock on the stock wiper arm must be in the "closed" position, making the hole smaller. Then, with the E-adapter on the M-base installed on the wiper, come in at an angle to hook the end and then lower the blade parallel to the arm. Press down with your thumb and it locks into place with a "snap". I apologize for the sideways video! We should have the better video posted on Monday (11/18/19) and I'll send the link.
I had no problem getting the blade with E clip to stay on once I tried with the lock in the closed position. On my other attempts it did not 'click'/lock-in. No rain in the ATL for the next week or more so unfortunately I won't be able to test it for a while.
From PIAA EVP:Just circling back with you. We received the C Class wiper arm today and have verified that the M base and E adapter actually do fit the 2015 - 2019 wiper arms. We are going to shoot a video tomorrow showing the installation. . . . Our marketing dept wasn't able to finish the pro-edit on the video but I just shot a few quick clips on my cell phone for your reference. The plastic sliding lock on the stock wiper arm must be in the "closed" position, making the hole smaller. Then, with the E-adapter on the M-base installed on the wiper, come in at an angle to hook the end and then lower the blade parallel to the arm. Press down with your thumb and it locks into place with a "snap". I apologize for the sideways video! We should have the better video posted on Monday (11/18/19) and I'll send the link.
I had no problem getting the blade with E clip to stay on once I tried with the lock in the closed position. On my other attempts it did not 'click'/lock-in. No rain in the ATL for the next week or more so unfortunately I won't be able to test it for a while.
Ok so how do we order these wipers and adapter? Are they on Amazon yet?
My data point here. I too was having crazy skipping issue to the wiper blade. My car is 2018 C43 and dealer just replaced both wiper a few days ago. I did not use wax or anything on the windshield before.
I solve the problem by applying
RainX 800002243 Yellow Windshield Treatment
to the windshield AND blade.
i did not clean them with alcohol or anything, just wipe them dry them apply A LOT of it, and did 3 coats. after applying it, I waited like 20 minutes and come back wipe it clear.
The coatings usually help short term but it will return.
Only success I've had is properly cleaning the glass with the OEM spec cleaner referenced in the bulletin. My GLC does it very lightly and I haven't cleaned it as of yet, but there is some sort of coating or contamination on all the cars when they come in and once cleaned and with good OEM blades (which are suggested to be changed 2x a year according to MB), it should be ok.
I bought one PIAA 97055. Good suggestion.
However, does not seem to operate any differently than OEM wiper blade.
I then bought OEM glass cleaner. This does seem to reduce wiper skipping with either PIAA or OEM blade.
I have only used it for a short time, so not sure how often it needs to be reapplied.
FWIW, picked up GLC300 in Germany and original factory blades worked perfectly for the year until replaced by dealer at service. Then same fiasco with skipping over the residue lines they created within a few minutes of operation on a clean windshield. That happened within minutes of leaving the dealership. Got tired of cleaning the residue every rainy day. Dealer replacement of the same model blades and adjustments did not solve anything and the replacements started their residue and tap dance shortly after driving off as well. Reviewing the options I went with the Bosch aerotwins 3397009843 from o’reilly as I needed them “now!” Only had them running for a couple of days of nonstop rain but so far no residue and no jumping. The lack of any residue over the same period of use is encouraging so far. The aero twin design looks like the oem but more substantial (wider air wing). Looks like it would catch more air drag thus more force pressing the blades on the windshield. But that may or may not be relevant. Going on a two week road trip with lots of rain expected. That will be the test. I’ll be happy even if I only have to clean any blade tripping residue once every couple weeks instead of every day.
FWIW, picked up GLC300 in Germany and original factory blades worked perfectly for the year until replaced by dealer at service. Then same fiasco with skipping over the residue lines they created within a few minutes of operation on a clean windshield. That happened within minutes of leaving the dealership. Got tired of cleaning the residue every rainy day. Dealer replacement of the same model blades and adjustments did not solve anything and the replacements started their residue and tap dance shortly after driving off as well. Reviewing the options I went with the Bosch aerotwins 3397009843 from o’reilly as I needed them “now!” Only had them running for a couple of days of nonstop rain but so far no residue and no jumping. The lack of any residue over the same period of use is encouraging so far. The aero twin design looks like the oem but more substantial (wider air wing). Looks like it would catch more air drag thus more force pressing the blades on the windshield. But that may or may not be relevant. Going on a two week road trip with lots of rain expected. That will be the test. I’ll be happy even if I only have to clean any blade tripping residue once every couple weeks instead of every day.
Update: been raining without much of a break since original post. Drove 7hrs on freeway today with wipers running nonstop. After about 3hrs started noticing some light residue lines on glass at wiper reversal points, however, not anywhere near as much as the old ones, no blade jumping and no unusual or irritating noises. Most of the drive the wipers were “silent” compared to the rainfall. Surprisingly, by the time we stopped driving after 7 hrs, 90% of the residue had been erased off the glass by the wiping action. Still feeling great about these blades. Tomorrow expecting another 8hr drive with 100% precipitation. Will only post a follow up if the sentiment of satisfaction about these aerotwins changes.
My dealer told me that wiper blades are a wear-and-tear item and is not covered. I just didn't bother with it since it doesn't rain here and when it rains I rarely take my C63S out.
My dealer told me that wiper blades are a wear-and-tear item and is not covered. I just didn't bother with it since it doesn't rain here and when it rains I rarely take my C63S out.
Sorry but this "Wear and Tear" bull**** that these dealers push for obvious problems is starting to shut me!!
My dealer said all merc wipers skip due to the "environmental friendly" material used in them. I noticed they only skip on auto sensing or the slowest constant wipe speed and not on the faster speeds.
I changed them to piaa si tech silicone ones and although alot better they still skipped from time to time even after I ceramic coated the windshield.
Last edited by dctwc63s; Feb 23, 2021 at 03:03 AM.
My dealer said all merc wipers skip due to the "environmental friendly" material used in them. I noticed they only skip on auto sensing or the slowest constant wipe speed and not on the faster speeds.
I changed them to piaa si tech silicone ones and although alot better they still skipped from time to time even after I ceramic coated the windshield.
Mate the dealers can get fxcked!! Them and their "environmental friendly" wiper blades!!! A $200,000 car And it's a 4L V8 which burns through fuel like it's going out of fashion!!! "Environment" isn't going through my mind!🤦🏽♂️
Mate the dealers can get fxcked!! Them and their "environmental friendly" wiper blades!!! A $200,000 car And it's a 4L V8 which burns through fuel like it's going out of fashion!!! "Environment" isn't going through my mind!🤦🏽♂️
Couldn't agree more. Everything now a days is lowest cost with highest profit.
This has been a great read as I noticed already I have the jumping issue. Car is 4 yrs old with nearly 40k mi so whatever originally coating was on the windshield is long gone.
Wondering if more ppl have had positive experiences with the Bosch Aerotwins, or the PIAA wipers? for the PIAA, do you buy 2x 22" wipers or 1 22" and 1 20"?
Yes, by the 3rd set on a car with less than 10k miles they did replace a set under warranty.
I keep telling them it’s NOT the wipers! We did get some nice rain and I took a few videos for them to see what is happening and they will send to Mercedes Tech Dept. it’s like the water is being vacuumed back over the windshield. Only way to get i to move off the drivers side window is to go around a bend! The passenger side is fine….
hopefully, they figure this out as this is a hazard when driving in the rain or snow.
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