The radiators for 034/036 are is NLA from Mercedes and Mahle/Behr. I think the radiator you received is not correct for the 034/036 chassis.
Mahle/Behr
CR282000P (shown in your photo) crosses to Mercedes 1245003103 / 1245000002, which fits the 124.133/.193 six-cylinder turbodiesels. Note the ATF cooler fittings may be different, and there may not be an aeration fitting at the top of the radiator either.
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