Mercedes ECU Up for sale is a Working, in excellent condition Mercedes Engine Control Unit. Mercedes Part number-- ENGINE 0 280 800 013 / MBZ part number 001 545 68 32 / 0015456832 W107. This unit is out of a crash damaged 1980 450sl (R107 chassis). My list shows this should fit many R107 & W116 cars with K-Jetronic (450 models-all US models only) Your best bet is to check the part number of the ECU you are trying to replace with this items part number to make sure they are the same. These antique K-Jet injection "Computers" have not been easy to find for years now, and this is a good functional one in what I could call physically "excellent" condition. You might not find one nicer for ANY price.Though not nearly as complex as a modern day ECU, The way these K-Jetronic ECU's function is through adjusting the control pressure through the frequency valve based on the inputs it receives. This will alter the fuel system pressure (and amount of fuel injected) through the fuel distributor. Primarily this will affect hot and cold starting, as well as idle quality. The need for a properly functioning ECU with this system is clear!As always your best bet is to match the part numbers with the part you need. A faulty or water damaged ECU can cause a whole hots of issues with these cars, including non running, and random cutting out (but usually it will re-start moments later). Also idle control & emission issues are possible (excess smoke or overheating caused by lean running). Hot or cold start issues can be caused as well. These units are no longer available almost everywhere and VERY hard to find used. If you can find a new one, they are usually in the $1000+ range. Ouch, not here! This comes with a 30 day warranty.