Mercedes-Benz M115 engine

The M115 was a straight-four petrol engine built by Mercedes-Benz in the 1970s, the successor to the M121 and itself replaced by the M102. It differed from the M121 mainly in having a five-bearing crankshaft, and it was made in several versions of 2.0, 2.2 and 2.3 litres with different compression ratios and outputs for different applications. The 2.2 litre M115.920 shared its crankshaft with the OM615 diesel of the 220 D. It powered the 200, 220 and 230.4 saloons of the W115 range and the later 230 models, and it was also fitted to the G-Wagen as the 230 G and 230 GE and to commercial vehicles such as the L 408 G and the 409 LF transporter.