2010 GL450 Brakes Front & Rear Info
Thread Starter
Newbie
Joined: Nov 2013
Posts: 9
Likes: 1
From: Atlanta, GA
2010 GL450
2010 GL450 Brakes Front & Rear Info
I worked on the brakes last week and came up with the following reference information for the brake job...
Also a big 'Thank You!' to cmarshack and all those who have posted on brake pad/rotor replacement between the forums
Lastly these values are what I used for my 2010 GL450 - use at your own risk - if you are unsure of the part numbers/info, ask your friendly MB tech at the parts dept. Additionally on cmarshack's write up he used 20mm and 17mm sockets for his GL450. I had to use 21mm and 18mm sockets instead (not sure why). I elected to replace all the pads, rotors (mine was worn to limits), caliper bolts, and guide pins. I would've replaced the rotor locking screws - but I forgot to buy them and the ones on the car were still in good shape. The caliper bolts I purchased from MB dealer, brake guide pins from Advanced Auto Parts, and Rotors/Pads/Sensors as a set from a ebay seller. It's been approximately 400 miles since I put them on and so far so good.
My biggest mistakes
This is for a 2010 GL450 Brake Job
I included the torque values in in-lbs since I had a 3/8" torque wrench in in-lbs.
Front BrakesRear Brakes
Hopefully this will save some poor guy from fumbling through pages/sites looking for numbers!
Also a big 'Thank You!' to cmarshack and all those who have posted on brake pad/rotor replacement between the forums
Lastly these values are what I used for my 2010 GL450 - use at your own risk - if you are unsure of the part numbers/info, ask your friendly MB tech at the parts dept. Additionally on cmarshack's write up he used 20mm and 17mm sockets for his GL450. I had to use 21mm and 18mm sockets instead (not sure why). I elected to replace all the pads, rotors (mine was worn to limits), caliper bolts, and guide pins. I would've replaced the rotor locking screws - but I forgot to buy them and the ones on the car were still in good shape. The caliper bolts I purchased from MB dealer, brake guide pins from Advanced Auto Parts, and Rotors/Pads/Sensors as a set from a ebay seller. It's been approximately 400 miles since I put them on and so far so good.
My biggest mistakes
This is for a 2010 GL450 Brake Job
I included the torque values in in-lbs since I had a 3/8" torque wrench in in-lbs.
Front Brakes
Caliper Bolts (Qty 4)
MB Part #A 017 990 82 01 / M14x35 Bolt / 21mm Socket
Torque 80 nm or 59 ft-lb or 708.1 in-lb then 45 degrees
Guide Pins / Housing Bolt (Qty 4)
MB Part #A 000 421 35 74 / 9mm hex wrench/bit
Generic Part # H5089 / 9mm hex bit
Torque 55 nm or 40.6 ft-lb or 486.8 in-lb
Rotor Locking Screw (Qty 2)
MB Part #A 220 421 01 71 / M8x12 Fitted Screw / T30 Torx Bit
Torque 10 nm or 7.4 ft-lb or 88.5 in-lbs
Rotor / Brake Disk (Qty 2)
MB Part #A 164 421 14 12 / 350mm
Brake Pads (1 Set)
MB Part #A 164 420 18 20
Generic Part # xxx-1123
Brake Sensor (1, passenger side only)
MB Part #A 164 540 10 17 / M6 Screw / Torx E8 Socket
Torque 8 nm or 5.9 ft-lb or 70.8 in-lb
Caliper Bolts (Qty 4)
MB Part #A 017 990 81 01 / M12x35 Bolt / 18 mm Socket
Torque 60 nm or 44.3 ft-lb or 531.1 in-lb then 45 degrees
Guide Pins / Housing Bolt (Qty 4)
MB Part #A 000 421 08 18 / Torx T45 bit
Generic Part # H5025 / 8mm hex bit
Torque 25 nm or 18.5 ft-lb or 221.3 in-lb
Rotor Locking Screw (Qty 2)
MB Part #A 220 421 01 71 / M8x12 Fitted Screw / T30 Torx Bit
Torque 10 nm or 7.4 ft-lb or 88.5 in-lbs
Rotor / Brake Disk (Qty 2)
MB Part #A 164 423 13 12 / 330mm
Brake Pads (1 Set)
MB Part #A 164 420 19 20
Generic Part # xxx-1122
Brake Sensor (1, passenger side only)
MB Part #A 164 540 10 17 / M6 Screw / Torx E8 Socket
Torque 8 nm or 5.9 ft-lb or 70.8 in-lb
Hopefully this will save some poor guy from fumbling through pages/sites looking for numbers!
Junior Member
Joined: Jun 2014
Posts: 31
Likes: 1
From: Phoenix, AZ
2009 GL550
Thanks for the info. Do you happen to know the minimum thickness guidelines for the rotors? My technician is recommending replacing them but they look fine to me. I don't have any symptoms of them being cracked, warped or any other issues.
Thanks again!
Thanks again!
Thread Starter
Newbie
Joined: Nov 2013
Posts: 9
Likes: 1
From: Atlanta, GA
2010 GL450
Rotor thickness
I took my rotors to O'reillys to turn them and they told me my rotors has less then one mm to work with - all they could do was take the glaze off and that was it... The rotors had 65k miles on them already so I ended up discarding all four of them.
For yours GL550 model 164.886 (I don't know your vin but I think that's your model number, double check it though.)
Front Rotors
For yours GL550 model 164.886 (I don't know your vin but I think that's your model number, double check it though.)
Front Rotors
New rotors are at 32 mm
Wear limit at 29.4 mm
Wear limit for maintenance service at 30 mm
Rear RotorsNew rotors are at 22 mm
Wear limit at 19.4 mm
Wear limit for maintenance service at 20 mm
Good luck!
MBWorld Fanatic!
Joined: May 2005
Posts: 1,439
Likes: 540
From: Philadelphia, PA (USA)
2025 E53 Hybrid
I purchased the rotors and pads for my 2010 GL450 a few months ago and decided to tackle the job yesterday. I was pleasantly surprised to find the excellent "how to" threads posted by cmarshack and skysurfer.
I tried removing the caliper bolts with an 18" breaker bar, but, I just did not have the strength to loosen the bolts. I picked up a 1/2" drive 24" breaker bar from Advance Auto. This bar along with a six point 21mm socket gave me the needed leverage.
I pretty much followed the steps in cmarshack's post with one exception. I loosened the caliper bolts FIRST. I figured if I could not get those out I would have to pack up my rotors an pads and take them to an independent shop to do the job.
I was not comfortable loosening the caliper bolts with the wheels off and the GL on jack stands. So, I put the SUV on some 9" high Race Ramps which allowed me to access the caliper bolts with the wheels on. I used a standard length 21mm six-point socket directly attached to the breaker bar. I did not need an extension between the socket and breaker bar. I had no problem reaching the bolts and swinging the 24" breaker bar.
I did not remove the bolts. I just loosened them a quarter turn or less. The next step was to back the GL down the ramps and put it up on jack stands. I then followed the steps in cmarshack's post to complete the job.
For me, the most difficult part of the job was lifting the heavy tires and wheels back onto the hub. I used two wheel hangers to align the holes in the wheels with the threaded holes in the hub.
I tried removing the caliper bolts with an 18" breaker bar, but, I just did not have the strength to loosen the bolts. I picked up a 1/2" drive 24" breaker bar from Advance Auto. This bar along with a six point 21mm socket gave me the needed leverage.
I pretty much followed the steps in cmarshack's post with one exception. I loosened the caliper bolts FIRST. I figured if I could not get those out I would have to pack up my rotors an pads and take them to an independent shop to do the job.
I was not comfortable loosening the caliper bolts with the wheels off and the GL on jack stands. So, I put the SUV on some 9" high Race Ramps which allowed me to access the caliper bolts with the wheels on. I used a standard length 21mm six-point socket directly attached to the breaker bar. I did not need an extension between the socket and breaker bar. I had no problem reaching the bolts and swinging the 24" breaker bar.
I did not remove the bolts. I just loosened them a quarter turn or less. The next step was to back the GL down the ramps and put it up on jack stands. I then followed the steps in cmarshack's post to complete the job.
For me, the most difficult part of the job was lifting the heavy tires and wheels back onto the hub. I used two wheel hangers to align the holes in the wheels with the threaded holes in the hub.
Thread Starter
Newbie
Joined: Nov 2013
Posts: 9
Likes: 1
From: Atlanta, GA
2010 GL450
Glad to have help out! I had to go grab a 24" breaker bar as well to get the caliper bolts off. My local MB was going to charge two arms and two legs to do the brakes... I think I saved about 1k by doing it myself
