M111xyz engine compatability / interchangable ?

[david_slk]

Hi,

I have an SLK 230K R107 1997 R Reg with a dodgy engine ( M 111 973)

One of the cylinders is kaput .... low compression.

Replacement M 111 972 engines are prohibitively expensive, given the modest value of the car.

I was wondering if it is possible to use the engine block off a C180 ( M 111 920 / M 111 921 ) / C200 ( M 111 941 / M 111 945 ) as they are widely available at affordable prices.

or any other engines you can suggest.


I realise it may result in losing a little power, but could extend the life of an ageing car.

I'm not a mechanic, so any advice would be welcome.

Thanks

 

[BTB 500]

Putting in a different engine (even though smaller capacity) may give you grief from an insurance point of view as it will then be a 'modified car'.

 

[david_slk]

yes, need to consider insurance

but is it technically a problem ?