A45s Front Rotors minimum thickness - 34mm or 35mm?
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A45s
A45s Front Rotors minimum thickness - 34mm or 35mm?
My service center said I needed new rotors and pads - quoted me $1400, I tried another place I've used to service previous mercs of mine and they quoted $1900.
Does anyone know if the original rotors that come out of the factory have a minimum thickness of 35mm and hence my service center is correct in saying they need swapping out? I can't find any spec data on the internet and I figure there must be quite a few A45s owners coming up to similar mileage (kilometerage? lol) to mine who may have a similar story?
Back story:
Car is coming up to 2 years and 44,000 km but I do a lot of country km's.
Yes, I occasionally drive it hard from time to time and have had just the one track day at Phillip Island but was a bit surprised they needed replacing already.
I could not find aftermarket front rotors despite contacting a number of brake specialists (but rears are available!!) so I contacted a nearby Merc dealership for a price and they quoted $785 for a pair, so I bought them. Aftermarket performance pads off DBA (Disc Brakes Australia) were $150 so I bought them. Save myself $465 for an hour's work? A bargain I thought!
I picked up the new rotors and they clearly had stamped on them 34mm minimum thickness. Out of curiosity I checked the thickness with good quality digital vernier and they were 36.00mm.
I pulled off the wheels from my car and measured both the worn rotors. The unworn outer lip measured 36.00mm on both - same as new ones, not unexpected - but then the worn rotor measured (across 4 places) between 35.12mm and 35.24mm on both - unexpected.
I couldn't find anywhere where the min thickness was stamped on the originals despite giving them a clean in the obvious places where it should be stamped.
Going by the specs on my new ones, my old ones are not even half way worn through and hence I should get another 2 years and 40,000km based on current driving habits.
Hence my original question, does anyone know if the original rotors that come on the cars out of the factory have a minimum thickness of 35mm but maybe new replacement OEM ones are different alloy and hence can tolerate being worn down to 34mm?
Does anyone know if the original rotors that come out of the factory have a minimum thickness of 35mm and hence my service center is correct in saying they need swapping out? I can't find any spec data on the internet and I figure there must be quite a few A45s owners coming up to similar mileage (kilometerage? lol) to mine who may have a similar story?
Back story:
Car is coming up to 2 years and 44,000 km but I do a lot of country km's.
Yes, I occasionally drive it hard from time to time and have had just the one track day at Phillip Island but was a bit surprised they needed replacing already.
I could not find aftermarket front rotors despite contacting a number of brake specialists (but rears are available!!) so I contacted a nearby Merc dealership for a price and they quoted $785 for a pair, so I bought them. Aftermarket performance pads off DBA (Disc Brakes Australia) were $150 so I bought them. Save myself $465 for an hour's work? A bargain I thought!
I picked up the new rotors and they clearly had stamped on them 34mm minimum thickness. Out of curiosity I checked the thickness with good quality digital vernier and they were 36.00mm.
I pulled off the wheels from my car and measured both the worn rotors. The unworn outer lip measured 36.00mm on both - same as new ones, not unexpected - but then the worn rotor measured (across 4 places) between 35.12mm and 35.24mm on both - unexpected.
I couldn't find anywhere where the min thickness was stamped on the originals despite giving them a clean in the obvious places where it should be stamped.
Going by the specs on my new ones, my old ones are not even half way worn through and hence I should get another 2 years and 40,000km based on current driving habits.
Hence my original question, does anyone know if the original rotors that come on the cars out of the factory have a minimum thickness of 35mm but maybe new replacement OEM ones are different alloy and hence can tolerate being worn down to 34mm?
