I have a 1995 E300 that I'm about to change the GP's out on. I am fully aware of the breakage issue and dangers associated with them. One is already broken by the previous owner and will need a drill out job. My main concern is getting the right Beru/MB number as I refuse to use Bosch or any other brand that doesn't have the thicker nut at the head and bad QC issues, and need to know if there is any difference between the '95 and '96-99 GP's, such as length and resistance value. My main source for parts only has Bosch, so I have to go to the stealership for MB branded Beru's. My source has Beru's for the '96-99, but I can't find any tech info on them to make a comparison other than part numbers. I have searched the forum and googled to find the info but to no avail. Here are the MB numbers for the Beru plugs: '95 E300: 001 159 16 01 '96-99 E300: 001 159 21 01 . Does anyone know where I can find the tech info to verify which one to use? Thanks in advance.