i just had same prob with my 1991 126 model. Even the M/B dealer wouldnt do the job mostly because they didnt have the special tools. Best to buy a used control arm complete with hub. I just did that from great forum member who was parting out cars. If you can get an Arm & Hub and know how to use a spring compressor, you can do it yourself. It will take you about 8 hrs. Contact "jim16671836" on this forum as he may have part you need. I believe he is in Indiana.