There is one nut that is very hard to get to without this wrench
Watch the video below to see how this special wrench is used on the three nuts holding the exhaust downpipe to the turbocharger exhaust flange.
Special Curved 12mm Wrench for OM617 Turbo Engine Exhaust Pipe Flange nuts
$6.50
SKU:
TUL-12MMNUTBOX 
Product Details
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115 116 123 126 Chassis 5 cylinder Exhaust / Intake Manifold Gasket
Fits 1975 to 1985 300D 300CD 300TD 300SD. Includes correct alloy locking nuts
Fits W115 W116 W123 and W126 5-cylinder both turbo and non-turbo diesel engines from 1975 to 1985. Check yours for staining around the gasket. Also, check nuts for tightness. These symptoms may indicate a leak. This is an important maintenance item.
$3.90
OM617 Turbo Diesel Special Exhaust Nuts (3)
Copper plated Will also fit most 4 and 5 cylinder non turbo engines.
