W124 e250d

[pslynam]

Hi.

I'm looking at converting my W124 200 petrol to the late spec 250D 20V engine and auto box. It seems the engine number for this unit is OM605.911. Problem is they seem trickey enough to find.

Is the 250D engine fitted to the early W202 and W210 cars the same? They seem to have engine codes OM605.910 ERE and OM605.912 ERE respectively. Are the W202 and W210 fitted with ECUs or is the setup the same as the W124?

I dont want to fit a 300D engine to my W124 due to the cost of the road tax here in Ireland...

Cheers

 

[grober]

Mercedes-Benz OM605 engine - Wikipedia, the free encyclopedia
They are pretty "stodgy" performance wise till the turbo models came out in 95- now that's a good engine. Still mechanical indirect injection afaik so pretty bullet proof.

 

[91dm]

I think the OM605 fitted to the w124 was the only version of the engine with a mechanical pump.

I’m not sure about the non-turbo version but the turbo engines in the w202/w210 have an electronic part on the pump and are ecu controlled. The automatic gearboxes also have an ecu box in these models.

You could fit an om602 pump onto the om605 to bypass the electronics.

 

[bolide]

I'm looking at converting my W124 200 petrol to the late spec 250D 20V engine and auto box

Why?

Nick Froome
the independent Mercedes Estate specialists

 

[trapperjohn]

As an option go for something like this may be.

1989 Mercedes 190D 2.5 Diesel Black Saloon 190 Long MOT | eBay UK

 

[pslynam]

Basically for economy purposes. Ive invested a lot of money into the car in terms of bodywork etc. I would have thought this should be a relatively straightforward conversion...

 

[91dm]

The best option might be to buy an old rusty 250d and swap everything over?

A W202 C200 diesel has a 2.0 4 cylinder version of the engine which would keep it in the same tax brand.

 

[bolide]

Basically for economy purposes. Ive invested a lot of money into the car in terms of bodywork etc. I would have thought this should be a relatively straightforward conversion...

Unfortunately it's not a relatively straightforward conversion and it won't save enough in fuel costs to justify the work involved

If W124 diesels did 50-60 mpg It'd be a different matter. They do 33-35 mpg so why go to all that trouble?

Nick Froome
the independent Mercedes Estate specialists