|This article does not cite any references or sources. (December 2009)|
|Production||1973 to 1993|
Power update 
The OM616 was a 2.4 L (2404 cc) engine with power output of 65 hp (48 kW). In August 1978 the precombustion chamber was updated for more swirl and more efficient combustion. The new camshaft pushes the valves deeper so the air and smoke gases have less resistance. The engine capacity was lowered to (2399 cc) to satisfy engine displacement tax laws in Europe, but power output rose to 72 hp (54 kW). A similar technique power update around these time was also done on the OM615 and OM617.
For exchange engine purposes 
Later, more powerful versions of the OM616 are interchangeable with early ones. This is done with many older transporter vans and campers like the 207D and 307D models. It is not possible to change only the cylinder head for one with the higher rating, since the higher valve lift of the later versions will interfere with the early pistons. It is possible to change to a more powerful straight-5 OM617 but modifications to engine mounts, the hood, and other underhood components (notably the radiator and cooling fan) are necessary.
The OM616 in India 
In 1982, Bajaj Tempo, now Force Motors, signed a deal with Daimler Benz to manufacture the OM616 Mercedes engine under licence in India for fitting on its line of vehicles. This Mercedes engine gave the company a technological edge over other Indian manufacturers leading to the success of several Bajaj Tempo models.
The Mercedes OM 616 or its variants still power the light commercial vehicles of Bajaj Tempo, including the tempo traveller, the new Excel series of trucks and the Trax range of multi-utility vehicles. At present, Bajaj Tempo is also assembling other Mercedes engines and supplying it to Mercedes Benz India Ltd.
The Bajaj Tempo OM616 engine is configured for different power outputs depending on the intended usage, from a 65BHP version, to the 91BHP Turbo charged version used in the Trax Gurkha (Which is superficially similar to the Geländewagen design)
Specs of the OM616 used in the Trax SUV: Model OM - 616(D-98)* Type 4 Cylinder, 4 Stroke, IDI Bore/Stroke (mm.) 90.9 X 92.4 Displacement (cc.) 2399 Compression Ratio 21:1 Max.Output 43.5 kW (ISO) at 4000 RPM Max. Torque 130 Nm @ 1800-2000 RPM Air filter Oil Bath Type Oil filter Bye pass flow type paper filter Fuel filter Dual filter Oil sump capacity (Lts) 6.5