SuperTuscan

Hello, I'm receiving conflicting information from my dealer. After conducting research, I've discovered there are two primary air filters to consider:
1. The engine air filter, situated in the engine bay.
2. The cabin air filter, typically positioned either behind the glove compartment or in the left rearmost corner of the engine bay.

However, the dealer insists there are three filters in total. This pertains to the US California GLC300 4Matic model, equipped with a 4-cylinder turbo engine.
What's the forum say? Thank you.

no_mulligan

Expand your research tools with YouTube. Search "GLC300 cabin filters". Don't stop looking until you see videos where they are going under the glove box.

DanD.

Dealer is right, there are three air filters
Engine filter
Dust filter right above your battery
Cabin air filter behind glovebox.

Takehold

3 is correct - I've changed them twice now on my 2020 - the one above the battery is easy but the one under the glove box is tricky and difficult to access and the engine air filter is also not straight forward - compared to my RX anyway(takes 30 seconds to change)

no_mulligan

I have found that when changing the engine air filter, the disconnecting vacuum hoses is challenging. Using a hose grip plier made it immensely easier. I also used a long (t-handle preferred) Torx tool to loosen the 5 screws securing the filter housing. FOLDUP set and individual L-style won't reach 2 or 3 of them.

DanD.

why do you need to disconnect vacuum line?
I do follow the WIS and it's an very easy process.

Takehold

^That must be for a different model year than we have. I remember on my 2018 GLC it was on passenger side but On my 2020 GLC300 the engine air filter is on the driver side and is a nightmare to change. I'd love to have the tech guide for my car. If you have it, can you post it? Thanks

DanD.

What is your engine number? Mine is 274 920
Try this decoder
https://www.lastvin.com/

Takehold

Mine is 264 920

Thanks for the link

Takehold

Didn't work for me - entered VIN 3 times and got error message - double checked each time - thanks anyway - maybe there is a way to find the instructions for the 264 engine without the VIN?

DanD.

What is the body?
Like 253.****

DanD.

see the attached. looks like this is what you need.

Takehold

Thank you! Perfect

no_mulligan

OK, not called vacuum lines but rather purge lines must be disconnected. I stand by my recommendations. I've done this air filter change about 5 times. This step is the only one that can pose difficulty.