I just had the same work done on my 91 190e 2.6 within the last two weeks - ouch
Here was the breakdown:
Labor for chain and tensioner: $324
Parts: Timing Chain, Chain Tensioner, Camshaft Seal, Front Timing Chain Cover Gasket, Valve Cover Gasket: $103
Labor: Remove and replace water-pump and bypass hose, remove and replace thermostat and upper/lower radiator hoses: $400
Parts: Pump ($232), Hoses and Thermostat: $61
The chain job was fine, but the water pump job was more than I expected. For those of you in the know, are these prices reasonable or did I pay too much?