shagin wagon

You will need the following:
- Air Filter (MB# 279 094 00 04). I used a Mann #C43139 equivalent.
- T-25 Torx screwdriver
- E-10 Torx female socket
- Clic-R hose clamp pliers (if you want to retain the OEM clamp)

Remove the engine front cover.
Remove front snorkel and flex boot.
Loosen hose clamp around airflow inlet to engine using clic-R pliers.
Remove (2x) torx bolts using E-10 female socket
Remove air flow sensor connector. There is a small gray tab/latch that needs to be lifted up to release the connector. Be gentle, you don't want to damage the air flow sensor.
Pull air filter housing from engine compartment.
Remove (3x) T-25 torx screws from top of air filter housing. You can then open the housing like a clam-shell.
Insert new filter.
Reverse the process .... your done!

SuPER__S

I am installing a K&N filter tomorrow and this info helped ! Thanks.

Where can I buy this ( Clip-R hose clamp pliers ) Any local store like HomeDepo ? LOWES ?

Thanks in advance......

samaritrey

Only place I have seen the Clip-R hose is online. Maybe check Harbor Freight?

shagin wagon

I bought mine off Amazon, search by Mercedes clic or clic-r hose clamp pliers.

johnyon123

Hi!! For that small "gray tab/latch" that needs to be lifted up to release the connector; do we push it down or push up? Isn't it "push down"? Thanks...

johnyon123

Hi!! For that small "gray tab/latch" that needs to be lifted up to release the connector; do we push it down or push up? Isn't it "push down"? Thanks...

heida11

Am able to get the GREY tab to come up 1/16 of an inch but won't release the connector.

lsutigers35

Hi guys, I am having the same problem getting the airflow sensor to detach. The grey tab does not want to move at all in any direction. Any advice? Thanks!

p2gurlitt

Hi Shagin Wagon, how can I remove the air flow sensor?
the grey clip is not moving the way you described.


Thanks!

lsutigers35

I discovered that the grey tab "pops" upwards with the help of a flat head screw driver. Place the head of the screwdriver under the lip of the tab and pry (gently) upwards. I was hesitant to use any tools here due to the advice to be gentle with this part. However, the tab would not release by hand.

jchiu52

i just replace mine with AFE air filter (oil free)

johnyon123

Does the Grey Tab need to be pulled out "completely" so that the black tab can be released?

capkid2a

Regarding the air flow sensor connector / grey tab: There is some slack in the wiring so you can (carefully) remove the air filter housing and place it on top of the engine without disconnecting the wire.

rojorin

yikes I just broke the grey tab on the sensor. Did it with my thumb it was so brittle. Ended up not taking it off and just pushed the broken tab back in to hold the sensor down. Can this connector be replaced? Not sure where the other end of the wire goes as it is all tied up in a wire loom with other wires. what do you all suggest? just leave it as is? Splice in a new connector? I'm really bummed this happened. There is so much plastic in these vehicles must happen all the time as these cars age.

rojorin

bump??

JohnnyC

Did this today on my GLK350 (we share the same engine ),
here is how to release the tab.

jaketuff

Can anyone clarify what part # that gray clip insert is??? I can't be the only one to have lost it... !!!

sams_6

I too broke that little lift handle tab on the sensor but the stem of the tab remained in place. It was in the 'up' position at the time so I was able to persuade the connector off and complete the filter replacement. Upon reassembly I pushed the tab stem down with a screwdriver to lock the connector back in place. I'm hoping that next time I need to remove this connector I'll be able to push on the the bottom of the stem with a hook tool or something similar.

To repeat jaketuff's questions - can this clip retainer be replaced without replacing the entire connector (looks like the wires to it head of into the nether regions of the engine compartment)? If so, does anyone know the part number?

As for clic-R pliers: I bought one from Amazon for about $11. Worked well.

chassis

Great M276 writeup, thanks.

MBSang

This is probably the right way, but I did changed mine without removing entire air filter housing.
I only removed flexible pipe that is attached to the filter housing, then removed three T-25 Torx, and able to pull the filter out. It is a lot easier than thought...

sams_6

Thanks MBSang. I'll try next time to replace filter without pulling off the sensor connector. I'll also try to see if I can use a paper clip or hook or something to lift my broken clip and post the results of that (will be useful for others whom have also snapped lever of the little gray clip).

JohnnyC

You can't buy the grey tab by itself. The entire connector is 025-545-65-26.

chassis

JohnnyC, are the terminals removable from the existing connector? i.e. can they be pushed out? Or does the old connector need to be cut off, wires stripped, new terminals crimped on, then inserted into the new connector?

JohnnyC

They are removable. The connectors are typically made by either Delphi or TE Connectivity. They have special tools designed to remove the terminals from certain housings, but this particular connector is very simple and can be removed with a pick. I might have an old picture of how to remove it, but TE Connectivity also has resources available to learn about how to disengage common terminals.

hancdc1

Great write up. Thank you for posting this. I'm not a master mechanic by any means. Very easy to do if you know what tools to use and what sequence to do it in.You just saved me a lot of money.