Endurance Diamond Plan - Washer Reservoir Claim Taking 5+ Days? (2012 S550)
Thread Starter
Junior Member
Joined: Dec 2025
Posts: 41
Likes: 5
From: Chicago
2012 S550 Base
Endurance Diamond Plan - Washer Reservoir Claim Taking 5+ Days? (2012 S550)
Hey guys,
Dropped my 2012 S550 Base off at my local Indy shop on Tuesday for some standard routine maintenance (coolant flush, brake flush, belt/pulleys). While it was there, I had them look into a massive windshield washer fluid leak I noticed recently.
The mechanic got under the front driver-side wheel liner and confirmed the actual reservoir bottle is cracked and leaking everywhere. They quoted about $500 for the fix (parts + labor).
I have an Endurance Diamond Plan (exclusionary policy) that I bought back in December, so I'm well past my waiting period. The shop filed the claim with Endurance on Tuesday, but it's now been 5 days and we are still waiting to hear back on the final approval.
For those of you running an Endurance policy on your W221:
1 Is a 5+ day turnaround time normal for them to approve a basic claim like a washer reservoir?
2 Have any of you had trouble getting a cracked fluid tank covered under their top-tier Diamond plan, or should this be an easy approval since it's an exclusionary contract?
The car is just chilling at the shop right now while we wait for the adjuster to give the green light. Any insight on your experiences with Endurance claims timelines would be awesome.
Thanks!
Dropped my 2012 S550 Base off at my local Indy shop on Tuesday for some standard routine maintenance (coolant flush, brake flush, belt/pulleys). While it was there, I had them look into a massive windshield washer fluid leak I noticed recently.
The mechanic got under the front driver-side wheel liner and confirmed the actual reservoir bottle is cracked and leaking everywhere. They quoted about $500 for the fix (parts + labor).
I have an Endurance Diamond Plan (exclusionary policy) that I bought back in December, so I'm well past my waiting period. The shop filed the claim with Endurance on Tuesday, but it's now been 5 days and we are still waiting to hear back on the final approval.
For those of you running an Endurance policy on your W221:
1 Is a 5+ day turnaround time normal for them to approve a basic claim like a washer reservoir?
2 Have any of you had trouble getting a cracked fluid tank covered under their top-tier Diamond plan, or should this be an easy approval since it's an exclusionary contract?
The car is just chilling at the shop right now while we wait for the adjuster to give the green light. Any insight on your experiences with Endurance claims timelines would be awesome.
Thanks!
Super Member
Joined: Feb 2009
Posts: 730
Likes: 221
From: Brooklyn, NY
2007 S550 4Matic 2013 S550 Base
It's rarely the reservoir that's the problem and if you're looking at it through the wheel well it would appear there is a huge crack in the reservoir when the real issue is the hose connected to the pump that houses the sprayer jets that needs to be replaced.
Thread Starter
Junior Member
Joined: Dec 2025
Posts: 41
Likes: 5
From: Chicago
2012 S550 Base
So the shop is giving me a BS story then?
Super Member
Joined: Feb 2009
Posts: 730
Likes: 221
From: Brooklyn, NY
2007 S550 4Matic 2013 S550 Base
Or they're just mistaken because they took a cursory glance at it. I picked up a 2013 Base in January and had a problem with the reservoir leaking. I took out the fender liner, poured some water in the reservoir and could see it flowing out but couldn't see exactly where. I had to partially pull the reservoir to remove the pump to see what the problem actually was which was a failed washer jet assembly, the reservoir was fine.
MBWorld Fanatic!
Joined: Feb 2012
Posts: 2,658
Likes: 1,236
From: Phoenix
222 S-65
They are old enough that the reservoir can be warped/cracked. Much more common is the grommet that seals the pump to the reservoir has rotted away due to age and/or the pump is leaking. Also our little friends (rodents) find the hoses and wiring to be particularly fun to chew up.
Rodent damage is NEVER covered by an extended warranty... But comprehensive coverage will in most cases.
If it is taking five days your service advisor is not chasing after them.... Which is required with certain extended warranty companies. Endurance being one of them.
Rodent damage is NEVER covered by an extended warranty... But comprehensive coverage will in most cases.
If it is taking five days your service advisor is not chasing after them.... Which is required with certain extended warranty companies. Endurance being one of them.
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Joined: Apr 2021
Posts: 1,575
Likes: 476
From: Scottsdale, Arizona
2001 E55AMG
Endurance :'( Good luck OP!
Trenton O. Gibson
tgibson@highline-autos.com
Highline Autos
Direct: 602.909.9216
Office: 480.348.0777
Trenton O. Gibson
tgibson@highline-autos.com
Highline Autos
Direct: 602.909.9216
Office: 480.348.0777
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Super Member
Joined: Oct 2023
Posts: 579
Likes: 198
W221 S500
The only warranty worth the paper it's written on is the MB Approved warranty as that's effectively an extension on the factory one. I very much doubt there's a W222 still covered, let alone a W221.
There's plenty of W221 dismantled in the US that getting hold of a replacement bottle should be child's play. Even FedEx could have delivered in 5 days.
Is the shop making stuff up? Not necessarily. But the only way you can be sure is by doing your own diagnostic work, then have a known trusted shop confirm the diagnosis and perform the repair (if you're not confident in doing it yourself).
There's plenty of W221 dismantled in the US that getting hold of a replacement bottle should be child's play. Even FedEx could have delivered in 5 days.
Is the shop making stuff up? Not necessarily. But the only way you can be sure is by doing your own diagnostic work, then have a known trusted shop confirm the diagnosis and perform the repair (if you're not confident in doing it yourself).
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MBWorld Fanatic!
Joined: Oct 2021
Posts: 1,199
Likes: 638
From: Iowa
2008 CL550, 2022 EQB 300, 2023 EQS 450 4Matic
Mine was leaking at the pump. MB replaced mine under my old now expired warranty and it was soon leaking again. Endurance from my understanding is the worst...save your energy to fight them on a more substantial claim--this is an easy fix. Just take off the wheel, wheel liner, and find the leak and replace with parts new or used that will only cost you a few dollars--like under $50 for everything.
Super Member
Joined: Feb 2009
Posts: 730
Likes: 221
From: Brooklyn, NY
2007 S550 4Matic 2013 S550 Base
Mine was leaking at the pump. MB replaced mine under my old now expired warranty and it was soon leaking again. Endurance from my understanding is the worst...save your energy to fight them on a more substantial claim--this is an easy fix. Just take off the wheel, wheel liner, and find the leak and replace with parts new or used that will only cost you a few dollars--like under $50 for everything.
Thread Starter
Junior Member
Joined: Dec 2025
Posts: 41
Likes: 5
From: Chicago
2012 S550 Base
Mine was leaking at the pump. MB replaced mine under my old now expired warranty and it was soon leaking again. Endurance from my understanding is the worst...save your energy to fight them on a more substantial claim--this is an easy fix. Just take off the wheel, wheel liner, and find the leak and replace with parts new or used that will only cost you a few dollars--like under $50 for everything.
I haven't had any issued with Endurance , your shop has to just know the exact things to say to get your claim approved.
