Don't lose your high mileage (above 150,000 miles) 103 engine due to a failed timing chain. If this chain breaks at high speed it can destroy the engine.
190E 2.6 300E 300SE Timing Chain and Link - 103 Engine
$59.00
SKU:
GRG-COM103TC 
Product Details
Applicable Benz are the 6 cylinder 190E or 300E (CE and TE) or 126 300SE / L with the single cam gas engine. When replacing the timing chain we also recommend replacing the chain tensioner. To add a valve cover gasket. Both are listed below.
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$72.00
190E 2.6 300E 300SE Timing Chain Tensioner - 103 Engine
When replacing your 103 engine timing chain it is also important to replace the chain tensioner.
$19.50
190E 2.6 300E 300SE Valve Cover Gasket
103 Engine
New valve cover gasket. Common source of engine oil leaks. Must be replaced any time you remove the valve cover. Fits all 103 engines 1986 to 1993. No instructions included.