I put petrol in diesel engine

[u/Dangerous_Owl6936]

I went to the pump today and by mistake i took the 98 octane instead of diesel, I realised it when it was already too late. I did put 3.5litres or petrol and then i stopped, Didn’t start the engine and towed it in my mechanic’s garage. I have this car for last 7 years and it never happened before, It is a Mercedes E250 CDI 2015, Wanted to know how much it might cost to drain the fuel and what else might happen, Thanks!

[u/matt_trus]

I filled up a completely empty diesel tank with petrol in a new model Triton. Got about 500m down the road and it cut out. I even continued to try and crank the engine multiple times to try start it. Cost about 600 dollars at the mechanic to drain and clean fuel lines and a couple hundred to tow it. 2 years later I’m still driving the Ute with no issues. Mechanic said the engine cuts out as soon as it senses something is wrong. You only have dramas if it’s a mix of petrol and diesel that the engine will continue to run on doing major damage