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Matt, Mechanical Engineer
Category: Mercedes
Satisfied Customers: 22758
Experience:  BEng hons Mech engineering, in auto industry 22 years
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I have a Mercedes CLS 350 auto. Petrol car 2007. I'm told

Customer Question

I have a Mercedes CLS 350 auto. Petrol car 2007. I'm told water got into engine and damaged the con rods . Is this a big job is it in fact a new engine that will be needed. And if. The engine is changed will the car be perfect after the job is done. Lastly. What should be the approx cost of doing the job
Submitted: 3 years ago.
Category: Mercedes
Expert:  Matt replied 3 years ago.


if the engine has swallowed water by being driven through deep puddle or similar then yes its quite possible that its been damaged
sometimes in these cases its possible to repair the engine but often the bent rod or rods will end up wrecking the rest

so I'd suggest the most economic repair is to source a good used engine and have that swapped in

typcially expect to pay about £2000 for a engine and its aleast a days ( 8 hours) labour to exchange the units over

if a mercedes dealership was to tackle this then you're looking at a £200 / hour labour rate
So I'd suggest o use a independent as their labour rate will be about £80/ hour

as for locating an engine try the merc specialists

and if the work is done well then there's no reason why the car should not be perfect after this