aguita

i got my new rotors and im planning to install them myself..but i dont know which side is the L nd the R...does anyone knows the correct way to install them...i dont know if the ventilation(not cross drilled) goes looking foward or back..please help

SaMaS

look at your rotors that you have now on the car... hope it helps

aguita

wish i could..the rotors were off already..dont remember which position they were oriented

Eurosport

if you don't see any arrows then they are the same

aguita

the rotors fits both sides but i mean the orientation of the cooling fins i dont know which side should face foward?

SaMaS

ok mine facing toward the rear <== ... hmz but who knows maybe mine is mounted wrong hope it helps

aguita

sorry if this is alot of job but can you or someone take a pic of the cooling fins so i can know which way to install them..i dont understand what u mean by facing towards...

ruBENZ

OEM rotors are 210-421-1812-OEM Left; 210-421-1912-OEM Right. That should help.
Here's a PIC of an OEM:

Peter_02AMG

Mine fins point toward the rear.

aguita

oh man this is making me nuts! now the car make a hummin sound when slowing down ...dont know if this is caused by the new pads or rotors installed wrong... what you mean by the fins point foward..if you look form top of the rotor to the cooling fins they should be /// or \\\ when you move foward

aguita

anyone??

nick 55

Look at the rotor part numbers, just after that, there is an L on the driver side one, an R on the passenger side one.