When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
EQS 450 4Matic SUV brake inspection at 44,500 miles
I am taking my EQS SUV to the dealer for its annual PA Safety Inspection tomorrow. I decided to check the condition of the rotors and pads beforehand.
The minimum thickness stamped on the rotors is 30.4mm for the front and 19.4mm for the rear rotors. After 44,500 miles the actual thickness (measured with micrometers shown in photos) for the rotors is 32.8mm and 21.7mm for the front and rear respectively. I haven't been able to find specs for the thickness of new rotors, but I suspect that it is 33mm/22mm for front/rear. Based on the wear over the last two years, I think the rotors could easily make it to between 150,000 and 200,000 miles.
I estimated the thickness of the pads by comparing them to hex wrenches as shown in the attached photo. The front pads were about 7.5mm and the rear pads are about 5.6mm. I purchased a new set of rear pads and measured the thickness of the friction material to be just under 8mm. I do not know the thickness of new front pads, but I speculate that it could be as much as 10mm. Based on the condition of the pads, I estimate that they will last for 100,000 miles. The minimum thickness is 1.6mm to pass the PA State Inspection. i would estimate the rear pads to be down to 3mm by the time I reach the 100,000 mile mark. The rear wear sensor will trip at between 3.5mm and 4mm pad thickness, so the sensor may have to be removed between 80,000 and 90,000 miles.
As a point of information, I do not use the Lane Keep Assist feature because I don't like cleaning the brake dust off the rear wheels. If you use LKA, then the rear pads will wear at an accelerated rate.
While inspecting the brakes I rotated the tires. After 20,000+ miles and each tires spending time in each position, the tread depth is 9mm on all four tires. It's a little less on the most inner groove. The 265/50R-20 Pirelli Scorpion AS Plus 3 XL tires start with 11/32" tread depth. I am very happy with these tires and I expect them to last at least 50K miles.
Got through the PA State Safety Inspection at the MB dealer today without having to make any repairs. The tech measured the front brake pads to be 12mm and the rear pads to be 10mm. These numbers were about 4.5mm greater than the pad thickness I measured. Apparently, the tech's measurements include the backing plate thickness. I measured the tread depth to be 9/32 on the second groove from the outside of the tire. The tech measured the depth of the first groove from the inner edge and reported it has 8/32 which is close to the measurement I got on that groove.
Note: I erroneously indicated a tread depth of 9mm instead of 9/32 in post #2 above.
I have about 58.5k miles on my car, and the MB dealership told me that my rear brake pads are down to 3 mm each and need to be replaced along with the rotors.
Based on what @LAZARU5 mentioned, I would’ve expected the brake wear sensor to have been triggered by now, but it is not. I do use lane-keeping assist, so I assumed my brakes might wear faster, but I was still hoping to get at least 75k miles out of them, which is about half of his estimate.
They’re quoting $2,400 for the replacement. Does that seem like a fair price?
Last edited by Gilbert580; Apr 20, 2025 at 12:06 PM.
I have about 58.5k miles on my car, and the MB dealership told me that my rear brake pads are down to 3 mm each and need to be replaced along with the rotors.
Based on what @LAZARU5 mentioned, I would’ve expected the brake wear sensor to have been triggered by now, but it is not. I do use lane-keeping assist, so I assumed my brakes might wear faster, but I was still hoping to get at least 75k miles out of them, which is about half of his estimate.
They’re quoting $2,400 for the replacement. Does that seem like a fair price?
New rear pads are 8mm thick. At the rate you are wearing them out you should be able to get at least another 10K miles out of them and still pass a State inspection. I would ask for a measurement of the rear rotor thickness. I would not be surprised if there was plenty of material left on the rotors. If I recall correctly the minimum thickness for the rear rotors is 19.4mm.
I have about 58.5k miles on my car, and the MB dealership told me that my rear brake pads are down to 3 mm each and need to be replaced along with the rotors....
I really doubt if your rear pads are worn down to 3mm thick. I attached a photo of an EQS rear pad along with a brake pad sensor. The thickness of the friction material on a new pad is 7.6mm. The diameter of the pin on the sensor that plugs into the pad is about 3.1mm. The edge of the hole where the sensor plugs into the friction material is about 4mm from the surface of the pad. You should remove a wheel and inspect the thickness of your pads, or at least have another shop do this for you. New condition EQS rear brake pad. 7.6mm thick friction material.
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Slideshow: A one-of-one U.S.-spec Mercedes-Benz SLR McLaren Roadster became even rarer after a factory-backed transformation at McLaren's headquarters.
