tkelley.EClass

Can anyone confirm this is the right part number? B66470155

I've asked 3 different vendors based on my VIN (WDDHF9BB2EA941414) and have gotten 3 different part number, not sure where to get the source of truth.

Zynthe

Mercedes has alot of different OEM locking nut keys. What I did was take my car to the dealership and the parts guy would come out to the car with 3 tool kits of locking nuts and he wouild see which one it is. Once he found the fitting one, we went inside and i got my replacement. Do it once right.

konigstiger

0019901607 (M14 X 1.5 X 27) black, online sources may claim does not fit and suggest 66470155 (M14 X 1.5 X 27) silver – your call.

tkelley.EClass

Thank you good sir!

Chamz333

this what I use and has different lock pattern for every wheel lock sold

McGard 28374 Black Bolt Lock Radius Seat (M14X1.5 Thread Size) - Set of 4, 4 Locks / 1 Key

Left Coast Geek

Probably not applicable to the OP's E550, but for folks with 17" 'Luxury' wheels, at least our facelift 2016, the stock lug screws are 30.7mm long, rather than the 27mm shank length of those McGard's, so best to check carefully against the specific config you have.