Keep in mind youll need a large allen wrench to change it. My 300D used a 14mm allen socket. Always remove the fill plug before the drain. why? it sucks getting stuck with a differential thats fully drained and you realizing the fill plug is frozen solid. its happened to me before.. and it really ruined the atmosphere for an hour until I got it out. (it took alot of cussing to finally get it to come out)
Learn from my mistake. fill plug first out, then drain!
2003 Jetta Wagon TDI 145,000MI
1999.5 Jetta TDI 287,000MI
2001 Suzuki SV650S 26,000MI
2008 Yamaha Vino 125 11,000MI