booster vacuum hose... which one????
 

I need to replace the booster vacuum hose of my 84 300TDT... the problem is given my VIN# a different vacuum hose is shown in the micro film as against the original part that came with the car.

Micro film part# 123 430 58 29
(the 2 outlet vacuum fittings that attach to the straw like vacuum lines are positioned far apart, thus the vacuum lines are too short to attach to it)

part# that originally came with the car: 123 430 74 29
(the 2 outlet vacuum fittings are positioned next to each other whereby they perfectly attach to the straw like vacuum lines)

From what it seems, the micro film part# is definitely not the correct one. What may have caused such discrepancy?? Can anyone please shed light on this. Thanks in advance.

I had a similar but reverse concern. My car originally came with 123 430 58 29. It was broken and I replaced it with the 123 430 74 29. Although 123 430 74 29 has a restriction orifice on one of the two small connections I have seen no difference switching from one booster hose to the other. I called MB NA and they said the booster vacuum hoses are functionally interchangeable but as you pointed out you may have to get some extra flexible MB bulk vacuum hose if you can no longer reach the one of the fittings on the booster. Too bad we're not neighbors as we could just swap them in the name of keeping things perfect.