Extended Warranties
I keep each of my cars for an average of 8 years and have never had a major repair. My 2018 E300 has not had any out-of-warranty mechanical repairs. The windshield was replaced for $50 insurance deductible.
Last edited by ua549; Apr 8, 2026 at 03:08 PM.
Trenton O. Gibson
tgibson@highline-autos.com
Highline Autos
Direct: 602.909.9216
Office: 480.348.0777

I keep each of my cars for an average of 8 years and have never had a major repair. My 2018 E300 has not had any out-of-warranty mechanical repairs. The windshield was replaced for $50 insurance deductible.
- It doesn't take much to run up a $10K bill on these cars (we just had a $12K cooling system repair on our Kia Niro EV (fortunately under the original warranty)), a work colleague had a $25K repair on his Etrons cooling system) which argues in favor of getting an extended warranty.
- Based on my following this forum the EQS has been remarkably reliable which argues against the extended warranty
- The battery warranty is 10 years 155K miles which in my view tends to argue against the warranty.
- You have to consider what the write-off costs of the car are as that will bound the payout for repairs.
- Which all comes down to what is the probability of having repairs that will exceed the cost of the warranty when you consider the maximum possible payout based on the residual value of the car.
Last edited by MBNUT1; Apr 9, 2026 at 08:22 AM.
Once again: You should buy insurance only if you cannot afford to pay the thing being insured against.
Trending Topics
I have an umbrella/blanket liability policy that covers all liability risks.
Insurance is a sunk cost, not a prospective cost.
The Best of Mercedes & AMG
Where an aftermarket warranty could be a good bet is if a car owner has better data than the insurance company. For example there is a board member who owned a W221 S600 who's after market warranty paid out multiples what he paid for the warranty. What you see is that the repairs for that car were not extraordinary for that particular model but my guess is that the warranty companies assessment of that model lacked the resolution to properly price the warranty or even offer it at all. This can be a real benefit of these boards in making these decisions.
Another rationale why a factory offered extended warranty might be a reasonable bet is that it is priced based on what the manufacturer's true part costs are and whatever labor rates they can negotiate with the dealers. Which is to say it costs the manufacturer significantly less to provide the warranty coverage than an owner would have to pay out of pocket for those repairs.
I don't believe it is rational to think that MB would sell parts at cost or that a Mercedes repair shop could purchase parts at less than wholesale cost.
(Think Fair Trade Laws)
The reality is that a franchised repair facilities buy parts at the dealer's price, not the manufacturer's cost. In addition, labor rates may be significantly higher at a MB franchised facility than at an independent facility.
s the labor by certified MB mechanics or under the supervision of MB mechanics? (Big Difference).
I found out the differences the hard way when my windshield was replaced with a ODM MB spec part, but it was actually made in China.
I just viewed a Car Shield ad. The said replacements are parts of "like kind".
Last edited by ua549; Apr 9, 2026 at 04:53 PM.
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
I don't believe it is rational to think that MB would sell parts at cost or that a Mercedes repair shop could purchase parts at less than wholesale cost.
(Think Fair Trade Laws)
The reality is that a franchised repair facilities buy parts at the dealer's price, not the manufacturer's cost. In addition, labor rates may be significantly higher at a MB franchised facility than at an independent facility.
Last edited by MBNUT1; Apr 9, 2026 at 08:08 PM.
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
Last edited by ua549; Apr 10, 2026 at 07:24 AM.
Trenton O. Gibson
tgibson@highline-autos.com
Highline Autos
Direct: 602.909.9216
Office: 480.348.0777
According to you competitive advertising is bad. You want to silence Danica Patrick, etc.
Trenton O. Gibson
tgibson@highline-autos.com
Highline Autos
Direct: 602.909.9216
Office: 480.348.0777
Another rationale why a factory offered extended warranty might be a reasonable bet is that it is priced based on what the manufacturer's true part costs are and whatever labor rates they can negotiate with the dealers. Which is to say it costs the manufacturer significantly less to provide the warranty coverage than an owner would have to pay out of pocket for those repairs.
Last edited by MBNUT1; Apr 11, 2026 at 07:19 PM.
Where an aftermarket warranty could be a good bet is if a car owner has better data than the insurance company. For example there is a board member who owned a W221 S600 who's after market warranty paid out multiples what he paid for the warranty. What you see is that the repairs for that car were not extraordinary for that particular model but my guess is that the warranty companies assessment of that model lacked the resolution to properly price the warranty or even offer it at all. This can be a real benefit of these boards in making these decisions.
Another rationale why a factory offered extended warranty might be a reasonable bet is that it is priced based on what the manufacturer's true part costs are and whatever labor rates they can negotiate with the dealers. Which is to say it costs the manufacturer significantly less to provide the warranty coverage than an owner would have to pay out of pocket for those repairs.
Trenton O. Gibson
tgibson@highline-autos.com
Highline Autos
Direct: 602.909.9216
Office: 480.348.0777









