Hypabl Posted May 2 Share Posted May 2 The thread for the brake calliper in my offside rear knuckle is damaged. I have been attempting to get an additional knuckle on eBay, but I am uncertain which one is compatible with my vehicle. The knuckle does not seem to have a part number. Aside from A203 04 05 The nearside is A203 05 05. I have located one from an R171 SLK that seems to be labelled A203 04 05. The 04 is ambiguous, although that is its apparent appearance. I have contacted the vendor to verify that it is a 04 in the centre, but they just provided me with the part number A2033501408, which is uninformative to me. I dispatched a second message accompanied by an image of the number in question and promptly recognised that I was communicating with an individual seated at a desk and unable to verify the information. The vehicle is a 2006 A209 equipped with the AMG sports package. The brakes are worn, and the bolts seem to be 10mm. According to my observations online, some callipers utilise 10mm bolts while others employ 12mm bolts. I presume that I cannot simply apply any knuckle. My inquiry is if I must align it with the one designated a203 04 05, or if any variant will suffice. Provided the bolts measure 10mm? Link to comment Share on other sites More sharing options...
Hypabl Posted May 2 Author Share Posted May 2 Located adjacent to the parking brake cable. Link to comment Share on other sites More sharing options...
Hypabl Posted May 2 Author Share Posted May 2 Upon reviewing several discussions. I recognise that there are numerous genuine technical experts on Mercedes present here. That possesses comprehensive knowledge if it features a star on the grille. Does anyone understand the meaning of a203 04 05? Since it is not a part number, I presume Mercedes did not include it only for aesthetic purposes. Link to comment Share on other sites More sharing options...
FreexPatty Posted May 2 Share Posted May 2 Have you conducted a Google search? Link to comment Share on other sites More sharing options...
Hypabl Posted May 2 Author Share Posted May 2 Affirmative, my friend. I cannot locate any information regarding compatible knuckles. Or the purpose of that code. Link to comment Share on other sites More sharing options...
FreexPatty Posted May 2 Share Posted May 2 What is the part number? Examine Partsouq for components compatible with your vehicle. Partsouq.com Link to comment Share on other sites More sharing options...
Hypabl Posted May 2 Author Share Posted May 2 The issue does not pertain to the part number. The part number consists of 10 or 11 digits. I encountered a thread (not related to Mercedes) posing the same inquiry, and the sole pertinent reply received was, "those figures likely originate from the specific casting or production batch that manufactured those knuckles." Thus, there is no conclusive response, although it is logical. This leads me to my initial inquiry. Is it possible to use any knuckle from different models such as w203, w209, c209, and r171, provided it is compatible with M10 bolts? Thank you for the link. I will examine it. I seek to verify my part number, however I am uncertain of its utility, to be honest. Link to comment Share on other sites More sharing options...
FreexPatty Posted May 2 Share Posted May 2 I believe that constitutes the fundamental casting. Although I lack your VIN, item 10 appears promising, as it was utilised across a diverse range of vehicles from that period and may serve as a useful starting point. Link to comment Share on other sites More sharing options...
FreexPatty Posted May 2 Share Posted May 2 https://partsouq.com/en/catalog/genuine/unit?c=MB201810&ssd=%24*KwG7j562-uHe-M3C-uumteP319DOv7C9vK6Bsvr8z9vHw8HCh5C81vj8-MnfxteRjIa7ssyuuLC_rZuRj9nayt3ax92t__6Bxcuvv7G4r8afk5Lbzdzdxtrx7pCl4P2qtazPz62h8rPgs-b64uWkrery5PC-sba49Pb_6pDv7bv2-s7yqvuv6vyAxKqjrOCqtbzm6vu7pK3pq7K-ueXu-r318fjs4M_28qjgs6qtoqvl7K_q_PC5u7i6v6qjr6O94LOqraKr5eSv6vzzz9utoqvr4a_q_PS_3a2iq_7sr-r886v1AAAAAHEmy0I%3D%24&vid=1860&cid=27996&uid=16492&q= Link to comment Share on other sites More sharing options...
Hypabl Posted May 2 Author Share Posted May 2 I greatly appreciate your assistance. Your appreciation is highly valued. It is, in fact, number 10 in the image. I have thoroughly utilised eBay for the past few hours. Null I have not observed it numerous times already. The majority are located abroad and exorbitantly priced. Some are rational yet categorised as left rather than right. Notwithstanding the images and explanation explicitly indicating a right. It is equally likely what may occur. All mails I dispatched this week (inside the UK) have been disregarded. Only one individual responded, and while it appeared to bear the same casting number. The part number differs from mine. It was intended for an SLK, however. Although utilised across a diverse range of automobiles. It appears that there are several numbers as well. Although it is the identical component. It has astonished me! I have concluded that I can tolerate no more. I will purchase one. If it is suitable, excellent. 👍 If it fails, the junk dealer will be pleased, and I will purchase another. Until one takes action 😂 The condition is not a concern. Since both the bearing and the bush are being changed anyway. Thank you once again for your assistance. Your appreciation is genuinely acknowledged. Link to comment Share on other sites More sharing options...
FreexPatty Posted May 2 Share Posted May 2 The distinction will lie in the machining process to accommodate various callipers for a diverse array of automobiles. Have you utilised your VIN to ascertain the specific part number for your vehicle? Link to comment Share on other sites More sharing options...
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