I'm taking delivery of a factory ordered GLC 350e within the next couple weeks. I asked my dealer if they could include the first couple years of service/maintenance within the cost of the vehicle. They are offering me the 3 year prepaid maintenance for $779 CAD plus tax. This package is usually $1779 plus tax so they are taking $1000 off. It includes Service A at 1 year (or 20,000 kms), Service B at 2 years (or 40,000 kms), and Service A again at 3 years (or 60,000 kms). I have included a picture that shows what is done at each service. Should I go ahead with this offer? Is an oil change still necessary every 20,000 kms? I plan to use the vehicle in EV mode for the most part so I'm wondering if that has any effect on the frequency of service/maintenance.
This will be my first time purchasing a factory ordered new vehicle. Should I be asking them dealer if they can include anything else? I'm paying cash so I was hoping they could throw in a few things but they haven't mentioned or offered anything to me.

Probably not a bad price for 3 oil changes and a brake fluid replacement. Be aware that remedies for everything beginning with "check" or "inspect" or not included. IMO, prepaid maintenance plans are promoted to get you into the service bay so you can be sold additional parts and services at high prices, such as cabin filters and wipers. It's unlikely you'll drive away without having left some money behind.

I recommend checking the Service B price around a few dealers and independent shops, asking if they can work on the car and service counter. For me, this is cheaper than 2 service B's so I would immediately purchase.

Where I live in Los Angeles, service B is 500 dollars now. Used to be 300 a few years ago. Some dealers offer it for 400-450, but it's not worth the hour or more drive. I do service A DIY on my 22 c300 or take it to jiffy lube since it's just an oil + filter change. I reset the service counter manually (check videos online) since shops can't through the OBD port. Service B, however, is more involved and independent shops around me still aren't the reliable when it comes to new MB. This is by design: mercedes has gone as far to lock out shops from resetting the service computer or performing diagnostic functions without paying for MB's Xentry software.

I have prepurchased maintenance on my 23 c300 and it covers all parts required for service B like fluids and cabin/intake filters. I would suggest confirming with the dealer and ask in writing to avoid unnecessary charges like @streborx mentioned. Wipers definitely won't be covered and you can purchase the same wiper Bosch supplies to mercedes for a third of the price. The only difference, it will say bosch on it instead of the mercedes star and doesn't have the replacement sticker which turns into that ugly yellow color.

The MB PPM I purchased in January 2025 includes wiper replacement, not just a check. Maybe the US version is different than Canadian? Overall, I consider it a good purchase.

Yep, my experience (not just an opinion) is that the PPM includes fluids, filters, checks, labor and wipers. No charges for parts. It is an easy way to keep your warranty honored.

The discount makes it worthwhile. At the standard price, it's meh and also - in BC at least - if you roll extras like this into the new car purchase, the provincial sales tax will be 10% rather than the usual 7% so that also is a disincentive at the usual $1700+ price.

I've gone with the prepaid maintenance on all of my Mercs. And never once have I had them try to get me to pay for something else at the servicing.

That's very strange that they would tax you more for add-ons. In Ontario it's 13% HST. Did your dealership offer you anything for free or give you any rebates/discounts?

Thanks everyone for your replies! I'm going to clarify with my sales representative on what is included with this prepaid service package. Maybe get everything in writing so there are no surprises when I bring the vehicle in. For the discounted price, I feel like it makes sense to go ahead with it because I don't think I could find any other reputable mechanic that would do three oil changes pn a GLC for less than $779 CAD.

Being a plug in hybrid, do I still need to get my vehicle serviced after every 20,000 kms? As I mentioned in my original post, I'm planning to use the EV mode primarily so would the oil and fluids not last longer than 20,000 kms?

If you want to keep your warranty valid, you need to stick to the published maintenance schedule. The electric motor is between the ICE and transmission, before the transmission torque converter. I can't find anything definitive written down from MB, but I believe that when the electric motor is being used, the ICE is also turning, since there is no clutch between the ICE and electric motor. My recommendation: keep to the schedule for oil changes. Also, don't forget to properly break in the ICE by driving in Sport mode for at least 500 miles. This last part isn't in the manual, but if you want piston rings, etc. to properly bet set, the ICE needs to be run under load when you first get the car.

The engine cannot be turning when the motor is in EV mode. The friction and compression losses would eat up all the electric motor power.

No compression. Valves remain open, just like an ICE that shuts down individual cylinders.

Thanks for the info! Does it have to be Sport mode for the first 500 miles or can I use Hybrid mode? What happens if you don't do this?

EL and H modes are the same except for one thing. Both prioritize the electric motor until the battery runs out. The difference is in how far down you need to push the accelerator before the ICE jumps in to help. It takes less to engage the ICE in Hybrid mode. The MB manual has you do break-in in E or H mode. But the ICE will not be under load. A better break in for the ICE is to run the ICE.

You are right about the additional losses from the ICE turning, even if it is free-wheeling with no compression. As I said, I cannot find any definitive information from MB.

Like a marine diesel with decompression levers? I cannot believe that the engine turns over when the car's under EV power. The wear on a cold engine would be astronomical. Do you have any technical documentation that would prove it?

It's got a freewheel mechanism that totally disconnects the engine from the transmission (and electric motor in the bell housing). It's also used in coasting when the engine is on.

I’ll remove foot from mouth now. 🫢 I standby properly breaking in the ICE.

No worries, you had me wondering for a short time!

You’re going to love your 350e!

Okay so to clarify, I don't need to break in the ICE for the first 500 miles? I'm okay to use EV mode right away?

I think the ICE needs to be broken in, ideally over about 1000 miles of use....some have suggested driving a new car in sport mode to make that happen sooner, but as long as you take it easy on the engine when it is used if you're mainly using EV mode then it will just take more miles to have that break-in done. Proportional to the number of hours the engine's been on.

There are two trip odometers. One is called ‘From Start’ (from when you last started the car, it resets each time you start it) and one ‘From Reset’ (the last time you reset it). Both display the percentage of electric use as well as mpg (or kmpg) and mpkWh. I kept the ‘From Reset’ trip odometer as-is so it showed my electric usage since I got the car. This makes it easy to calculate when you hit 500 miles on the ICE, or whatever goal you set for break-in.

Excellent, this was going to be one of my questions on delivery day. I wasn't sure if there was a display that showed how many kms driven with pure EV vs ICE. That being said, as long as I'm not reving the engine too much, the ICE break-in should not be a concern correct? I'm not looking to set record 0-60 times with this vehicle lol. I don't think I would ever put it into sport mode tbh unless it'll benefit the vehicle performance in the longterm

You'll be fine.