Extended warranty option on G63's
I bought an extended warranty for my 2020 G 63 two years ago. I paid $7,350 plus tax = $8,048). I was planning on keeping my G 63 for many years, so it seemed reasonable to purchase the extended warranty. However, I got an allocation for a 2024 G 63 a few months ago, so I decided to trade my 2020 G 63 to my dealer when my 2024 G 63 arrives in February.
When I purchased the extended warranty two years ago, my MB dealer explained that I could transfer the warranty if I sold my G 63 to a private buyer. He also said I could get a full refund if I cancelled the extended warranty before the original factory warranty ended (four years or 50,000 miles).
I don't want to cancel the extended warranty on my 2020 G 63 until the 2024 G 63 is a "done deal" and I have it in my possession (sorry, but I don't trust anybody). Once you cancel the extended warranty, you can't get it back. Naturally, all of the negotiations for the 2024 G 63 were taking place when my 2020 G 63 had 49,000 miles, so I was particularly interested in knowing the details of cancelling the extended warranty since I was going to hit 50,000 miles before my 2024 arrives. Nobody knew, or they wouldn't say, anything about the cancellation details, so I cracked open the extended warranty agreement and started reading. It was surprisingly clear:
10.1. You may cancel this Agreement at any time by submitting to the Selling Dealer or any Authorized Dealer proof of ownership for the Vehicle and a completed written Cancellation Form, which is available from the Selling Dealer or any Authorized Dealer.10.2. If this Agreement is cancelled prior to the date coverage begins, or within the first sixty (60) days after coverage begins, and no claims have been filed, the entire Agreement price will be refunded by the Selling Dealer.
10.3. If a claim has been made against the Agreement, or if the Agreement has been in effect more than sixty (60) days, the Selling Dealer will refund an amount of the Agreement purchase price according to the pro-rata method reflecting the greater of the days in force or the miles driven based on the term/miles selected and the date coverage begins, less the amount of any claims paid under this Agreement.
The bottom-line is you can cancel the extended warranty and receive a refund for all, or most, of the purchase price even after the extended warranty coverage begins. It's best to cancel before, or within 60 days, after extended warranty coverage begins. The refunded amount is pro-rated, so the cost to cancel is still relatively modest if you cancel after 60 days. Keep in mind, the refund amount will be adjusted to account for any claims under the extended warranty. This all seems reasonable to me.
BTW, I explained these cancellation terms to my MB salesperson, and she was surprised. She has been selling extended warranties for years, and she was not aware of these cancellation terms.
Most issues started around 42,000 miles.
Rear main seal leak
Air oil separator clogging, which caused rear main seal to leak again (it folds inwards due to the pressure)
Rear main seal is a cheap part (probably under $20, it's a rubber seal), but it requires to drop the transmission.
Thermostat on the m177 is not uncommon (you will find others fail at 5k to 50k miles), across the platforms.
Cheap enough part, but again, must remove a lot of the front end to get at.
Valve cover engine oil leak
These m177 are great, but if something goes wrong, it's all crammed together so lots of labor to fix. Not as bad as a Bentley W12 though.
I'm probably $15k-$20k in warranty repairs, so well worth the $11k I spent. I can drive up to 100k miles or until 2028 for peace of mind. I believe I took care of most of the major known issues to the m177 and hoping it's smooth sailing from here. It would have not been fun paying for all that out of pocket.
I plan on keeping this for a long time so keeping up-to-date on every service done at the dealer.

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Most issues started around 42,000 miles.
Rear main seal leak
Air oil separator clogging, which caused rear main seal to leak again (it folds inwards due to the pressure)
Rear main seal is a cheap part (probably under $20, it's a rubber seal), but it requires to drop the transmission.
Thermostat on the m177 is not uncommon (you will find others fail at 5k to 50k miles), across the platforms.
Cheap enough part, but again, must remove a lot of the front end to get at.
Valve cover engine oil leak
These m177 are great, but if something goes wrong, it's all crammed together so lots of labor to fix. Not as bad as a Bentley W12 though.
I'm probably $15k-$20k in warranty repairs, so well worth the $11k I spent. I can drive up to 100k miles or until 2028 for peace of mind. I believe I took care of most of the major known issues to the m177 and hoping it's smooth sailing from here. It would have not been fun paying for all that out of pocket.
I plan on keeping this for a long time so keeping up-to-date on every service done at the dealer.
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I paid about $8,000 including taxes for my extended warranty, so if I cancel after 60 days they'd calculate the partial refund as follows:
If pro-rated by miles, I believe I'd be charged $.16 per mile: $8,000/50,000 miles = $.16 per mile
If pro-rated by days, I'd be charged $7.31 per day: $8,000/(3x365 days) = $7.31 per day
The refund would also be reduced by the amount of any claims paid under the extended warranty agreement.

Last edited by SLS; Jan 1, 2024 at 05:37 PM.

I'm trading my 2020 G 63 for a 2024 G 63 (it's on the boat). I won't drive it off the lot without paint protective film AND windshield film.

Last edited by SLS; Dec 31, 2023 at 03:08 PM.

Worth it, or just spend the $500 and cover the windshield?

PS: what was the differential in the 2020 to 2024 trade? I'm thinking we will do something similar, once the bugs in the 2025 model year have been fleshed out, in a couple of years.
Last edited by SLS; Dec 31, 2023 at 03:06 PM.
The delta was $80K including the $15K ADM. It's easier to swallow if you amortize it over 4 years

PS: what was the differential in the 2020 to 2024 trade? I'm thinking we will do something similar, once the bugs in the 2025 model year have been fleshed out, in a couple of years.
I wanted to get the pre-paid, as I was hoping to saving a lot of money. Here is what my services look like:
50K, Basic A service (engine oil changed, tire rotation, inspection), spark plugs, front and rear axle gear oil change, wiper blades. ->> the "big" ticket items here is spark plugs, front and rear axle gear oil changes.
60K, Basic B service (Engine oil change, cabin filter, dust filter, brake flush, tire rotation, inspection) and wiper blades. ->> no "big" ticket items.
70K, Basic A service (engine oil changed, tire rotation, inspection) and wiper blades ->> no "big" ticket items.
80k, Basic B service, engine air filters, transmission oil and filter replacement and transfer case oil replacement ->> several "big" ticket items.
120k/12 years is replace fuel filter, replace main circuit coolant and replace low-temperature circuit coolant
You'll also want to keep track of any warranty items, because I got a lot of fluids changed for "free" that I don't need to do:
engine valve cover leak - "free" oil change
thermostat failure - "free" coolant flush and new fluid
rear main seal replacement - "free" transmission fluid flush and new fluid
I am getting this info from AP00.20-U-1208CS SERVICE SHEET for Mercedes-Benz Maintenance System (USA), 463 Chassis with 177 Engine Maintenance Sheet.

50K, Basic A service (engine oil changed, tire rotation, inspection), spark plugs, front and rear axle gear oil change, wiper blades. ->> the "big" ticket items here is spark plugs, front and rear axle gear oil changes.
60K, Basic B service (Engine oil change, cabin filter, dust filter, brake flush, tire rotation, inspection) and wiper blades. ->> no "big" ticket items.
70K, Basic A service (engine oil changed, tire rotation, inspection) and wiper blades ->> no "big" ticket items.
80k, Basic B service, engine air filters, transmission oil and filter replacement and transfer case oil replacement ->> several "big" ticket items.
120k/12 years is replace fuel filter, replace main circuit coolant and replace low-temperature circuit coolant
When I called around to dealers back in 2020, this was their rough estimates for at least the first two A/B services. I imagine prices likely have gone up. My guess is the A services remain around the same price as it's just an oil change + tire rotation, but the B services are the ones that will get pricey.
Dealer 1 (the one I serviced at)
A - $300
B - $800
Dealer 2 (Crappy dealer that has yet to give me an allocation despite being on their list for 3 years, during which time I've bought three G63's and turned down 2 more, but I digress).
A - $460
B - $1030
Tire rotation - $84
MB indy shop that has great reviews
A - $180
B - $350

A - $300
B - $800
Dealer 2 (Crappy dealer that has yet to give me an allocation despite being on their list for 3 years, during which time I've bought three G63's and turned down 2 more, but I digress).
A - $460
B - $1030
Tire rotation - $84
MB indy shop that has great reviews
A - $180
B - $350
1 year, 10k = nothing special
2 year, 20k = replace activated charcoal combination filter behind glovebox, replace brake fluid (every 2 years)
3 year, 30k = nothing special
4 year, 40k = replace activated charcoal combination filter behind glovebox, replace brake fluid (every 2 years) + replace engine air filter
So:
Engine oil = every 10k miles
Activated charcoal combination filter = every 20k miles
Brake fluid = every 20k miles
Engine air filter = every 40k miles
Spark plugs = every 50k miles
Front/rear axle oil = every 50k miles
Transmission fluid = every 80k miles
Transfer case oil = every 80k miles
4x4^2 only Portal Axle Front/Rear oil = every 80k miles
Fuel filter = every 120k miles
Coolant (main and low-temperature circuit) = every 120k miles (this seems a bit long, but don't worry - you'll have it changes when the thermostat goes out)
$3,200 does not seem like a good deal at all for year 1-4.
Last edited by haa; Jan 1, 2024 at 10:28 PM.

2 year, 20k = replace activated charcoal combination filter behind glovebox, replace brake fluid (every 2 years)
3 year, 30k = nothing special
4 year, 40k = replace activated charcoal combination filter behind glovebox, replace brake fluid (every 2 years) + replace engine air filter
$3,200 does not seem like a good deal at all for year 1-4.










