SL55/63/65/R230 AMG: Front caliper torx/bolt size?
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Joined: Feb 2009
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SL63, GTR
Front caliper torx/bolt size?
Anyone know what size the two hex front bolts are that hold the caliper in place are? I read that the rear bolts are E18 Torx but can't find any information on the front ones. Thanks...
Last edited by B Feelgood; Apr 10, 2011 at 02:45 PM.
Thread Starter
Senior Member
Joined: Feb 2009
Posts: 396
Likes: 21
SL63, GTR
I agree on buying tools is a good investment except that I already have a bunch of the smaller ones. This one is odd because it is a lot bigger.
The rear calipers require the female E18 torx. The front calipers appear to require a large male HEX socket. I am actually doing the rotors and pads so unfortunately I need to remove the caliper to get the rotor off. There is one big bolt on the top and one big bolt on the bottom of the front caliper, these are the two I am talking about that would appear to allow removal of the caliper.
The rear calipers require the female E18 torx. The front calipers appear to require a large male HEX socket. I am actually doing the rotors and pads so unfortunately I need to remove the caliper to get the rotor off. There is one big bolt on the top and one big bolt on the bottom of the front caliper, these are the two I am talking about that would appear to allow removal of the caliper.
Thread Starter
Senior Member
Joined: Feb 2009
Posts: 396
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SL63, GTR
Ok so I found a few posts saying that the correct size for the front is a "21MM socket." To my knowledge there was no way to get a regular open face female socket onto the caliper bolt as it was sunk in and flush. It appeared to need a male hex bit. Am I looking at the right bolts or can you actually get a regular socket onto the bolt to remove the caliper?
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Thread Starter
Senior Member
Joined: Feb 2009
Posts: 396
Likes: 21
SL63, GTR
Ok I feel pretty silly now 
It was late at night after work the first time I tried to start the brake job. I was actually looking at the wrong bolts. There are two female hex bolts about in the middle of the caliper "top and bottom" that must split the caliper in half like someone else mentioned. I found the correct 21MM bolts in the rear of the caliper and got them off fairly easy. Job is all done and they are most certainly 21MM 
It was late at night after work the first time I tried to start the brake job. I was actually looking at the wrong bolts. There are two female hex bolts about in the middle of the caliper "top and bottom" that must split the caliper in half like someone else mentioned. I found the correct 21MM bolts in the rear of the caliper and got them off fairly easy. Job is all done and they are most certainly 21MM 
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