You MUST remove the outer plastic fan assembly and the fan shroud. Also bolts that are common with the power steering pump need to be removed. I changed my tensioner on my 103 engine when I replaced my radiator. It gave me a bunch of room. The area between radiator and engine on the 103 engined Mercedes is extremely tight. Have fun. Have some beers on handwhen you begin to swear. You can do it.

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1990 190E 2.6
1996 Grand Voyager 3.3
1985 Mustang GT 5.0 5 SPD
1982 Suzuki GS 750T