I went to NAPA to purchase a front wheel bearing kit for my 1984 300 D turbo and the Sales person told me he had a kit for it and it was for a 50 mm. He said he did not know what that meant other than there must be another size that might be the one that fit. He said if it did not fit, to bring it back...well, it did not fit (one look at the outer bearing and I could tell it was way too small). I took it back. I talked to a different sales person during my return and he told me the same thing the first salesperson told me. Bad thing...the only one they sell was the one that does not fit. Now, everywhere I look online, does not specify a size. Can anyone help me get the right wheel bearing kit??