Dorman 917-299 Transmission Filler Cap Lock Pin Compatible with Select Dodge/Freightliner/Mercedes-Benz Models, 5 Pack

Exact fit for Transmission fill tube cap key

These locks didn't work for me (see original review below), but now that I ordered and have received a new CAP and O-ring and lock-pin set, I can see WHY these pins didn't work for me originally: the original cap had been damaged somehow when I removed it. There's supposed to be a small "hook" part of the cap that descends down and catches the lip of the filler tube, and then the lock pin presses against that hook to make it lock tightly against the tube lip. My removed original cap was missing that hook; must've broken off when I removed the original lock pin.Anyway, now that I have the complete kit in hand, I can see that these Dorman replacement pins are identical to what cam in the kit, and WILL indeed work properly to lock the hook of the replacement cap against the filler tube. I'm updating my review to 5-stars so that others aren't discouraged from buying them.---------- Original 2-star review below ----------I don't can't quite figure WHY these don't work for my 2009 MB CL600 transmission dipstick. When I bought it recently, it was clear that the OEM cover on the dipstick tube had never been "popped" since new. It was locked on solidly with the original black plastic locking tab. I broke off that tab and ordered these red locking pin replacements.After draining and replacing the transmission fluid, I used one of these lock pins to re-lock the OEM cap onto the dipstick tube. It seemed to slide into and fit the OEM top perfectly ... but the cap isn't in fact locked onto the dipstick tube. I can still easily pull the top off. No "click"; nothing. And I'm a little concerned that air pressure inside the transmission might cause the top to pop off (tho' it's been for a few long drives so far with the unlocked top staying put).I'm going to place an order for a new top and lock, but was really hoping these inexpensive lock pins would do the trick.

Like oem quality made.

Exact fit for my 2014 MB Sprinter 4 cylinder Diesel engine

perfect fit, however last order was a perfect deep red plastic now they look orange in color but they work...most important they work fit perfectly... thats really all that matters....also very cheap price will not find cheaper...Dorman is very good quality.

For model years when Mercedes introduced transmissions without dipsticks, they continued to provide a dipstick tube with a locked cap at the top end. To use a service (temporary) dipstick to check the fluid level, you have to break a small plastic tab to unlock and remove the cap. These lock pins fit the cap and allow you to lock the cap back in place after you have finished checking or servicing the transmission. Dorman provides these and they work as advertised. Good idea to keep several of them on hand if you have a Mercedes with a locked dipstick tube cap.

And absolute must for servicing the automatic transmission on your Mercedes, Volvo, BMW that doesn’t have a dip stick.

If you have a ML320 and need to check the trans you will need these.

all good cheeper than mercedes

Perfect fit. You won’t be disappointed. Price was $6 for a pack of 5 in match 2023.

These were a perfect fit, just like OEM. Arrived very quickly and seem to be of good quality.

Fit perfectly for my M/B2017 Sprinter Cargo Van 2500

As advertised, no problems, fast shipping.