Torx Bolt Head Size

[spanishdave]

Hi everyone ... I am new to this forum and am located in Valencia, Spain.
I am just part way through the OM642 oil cooler seal replacement. I was just wondering if anyone could tell me the head size of the 2 Torx bolts which fasten the turbo to the pedestal on this engine ... my car is a 2011 E350 CDI.
I have bought a set of E Torx sockets, but my Torx bits only go up to T40 and these bolts look like either T45 or T50 to me. I normally buy tools from Amazon over here, but will have to go out and source the bit locally as I want to crack on this weekend.
Thanks in advance
Dave