Those flex disks are asymetric -- the bolt "holes" are relieved on one side. Note which way the original is installed and put the new one in the same way.

Will make a big difference in vibration!

Peter

__________________
1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!