[wp326]

I saw the C350 has the front brake rotors drilled.
The e90/92 are not drilled.
Any difference in stopping power?

[LOLrance]

I'd prefer slotted anyways. Drilled has been known to crack over time.

The biggest difference is that drilled is usually lighter and disperses heat a lot better. Also, due to the nature of drilled rotors, they are always cleaning the pads surface so there is an increase in bite/pedal feel when you are braking.

[StarrDlux]

yes there is less contact area with drilled rotors and only TUV approved rotors should be used to prevent cracking which could kill you.

so for track - yeah drilled or dimpled
for road warriors - slotted is fine
for normal people who go fast now and then who want the maximum contact patch - plain is great.

of course there is bling factor and mercedes is more about bling these days than anything so i guess they look more p.i.m.p.

[wp326]

i just went to the dealership to look at the new m3 brakes, they are drilled AND slotted...and lot of brake dust. They turn orange/yellow.

[LOLrance]

Turning yellow is due to rusting and happens on all calipers not just drilled/slotted.

[Staszek]

Drilled are not worth it for a street car. MB is doing it mostly for show. Personally as others have said I like slotted better. And even then for a street car I would rather have plain.

Less noise, more contact area, saves brake pads.