Petrol in a Diesel Mercedes SLK: What the Tank Holds
Someone who has got petrol in a diesel Mercedes SLK wants to find out the size of its fuel tank first, as that settles how much of what is in there is currently petrol. Every version of the Mercedes SLK we hold figures for is set out on this page alongside its tank capacity, and so are the motors it came with.
When it has occurred, the same guidance holds whatever the number is. Keep the engine off then call Petrol in Diesel, and we'll come over to empty the vehicle where it sits.
Version by version: Mercedes SLK fuel tank capacity
The Mercedes SLK has the one diesel tank on every version we have data for, and it takes 60 litres.
What a couple of litres amounts to for wrong fuel in your Mercedes SLK
How full the tank was when you refuelled determines the proportion of petrol, since wrong fuel in your Mercedes SLK blends with whatever diesel is still there. In a tank that takes up to 60 litres, a couple of litres of unleaded added to an almost full tank is a minor share of the whole, and the same few litres going into a tank which was nearly empty makes up a much larger part of what your engine would pull through.
The quantity of petrol that's too much is something drivers frequently ask about. It is more helpful to check whether the engine has been run, as a running motor is what takes the blend out of the tank and through your pump and your injectors.
A fuel drain is the right course no matter what the share, and with a small volume it's usually all your SLK needs.
Which engines your diesel SLK was sold with
The version name on your badge shows us which engine your SLK has, so it is worth reading before you ring.
Diesel versions of the SLK in our data carry CDI badging.
When you ring, we can work out which version it is between us, even if you are not sure yourself.
When there's AdBlue in a diesel Mercedes SLK
AdBlue changes what the capacity of your tank means. If you have AdBlue in a diesel Mercedes SLK, your diesel surrounding it does not weaken it, since AdBlue is largely water and does not blend with diesel. It sinks to the base of your tank, which is where the fuel pump draws from, so even a tiny amount gets into your fuel lines.
As the water in AdBlue dries out, the urea left behind forms crystals in the lines and your filter and eats into the metalwork next to it, and AdBlue doesn't combust or give your pump any lubrication either.
The filler neck for AdBlue, on diesel cars that carry it, often shares a fuel flap with the diesel one and leads to a second tank. On any SLK with an AdBlue filler, a blue cap normally shows it, and that cap takes a slimmer pump nozzle than the diesel one.
Fuel drain on your Mercedes SLK
The entire tank is cleared in a fuel drain on your Mercedes SLK, however large the tank is in your version, without the vehicle moving from where it stands. First the contaminated fuel is pumped out, then the filter and fuel lines are purged. After refilling with fresh diesel, we re-prime the fuel system and fire up your engine.
Whether your SLK is still at the station forecourt or parked on your drive does not change anything. You can take it away once this drain is finished, and it will be running on clean diesel.
AdBlue removal from a diesel Mercedes SLK
Emptying your tank entirely is where AdBlue removal from a diesel Mercedes SLK starts, as AdBlue does not mix in and settles at the bottom instead. We also rinse your lines and the fuel filter through if your engine has been run, changing the fuel filter when it needs changing.
What this covers is AdBlue that ended up in the diesel tank, not removing or turning off the AdBlue system on the car.
Pricing a fuel drain on the Mercedes SLK
There's no fixed price published here, since call-outs on one model can differ quite a lot. How much got in compared with the size of your tank, petrol or AdBlue, and where your car is now all count, but whether the SLK has been driven or only started changes it most.
Phone with those facts so we can let you know what the job will need.
Queries on the tank and petrol in a diesel Mercedes SLK
What does the Mercedes SLK fuel tank capacity amount to?
It takes 60 litres, and each version we have figures for uses that tank.
With a bigger tank, is petrol less of a problem?
In a bigger tank, petrol is a smaller part of the total, yet it hasn't gone anywhere, and it gets to your pump as soon as the motor runs. Leave your SLK switched off and draining it gets all of that petrol out.
Is it wrong fuel in my Mercedes SLK if it's not diesel?
Only diesel belongs in your diesel tank. Petrol of any grade, super unleaded too, is wrong fuel, and so is AdBlue, which goes in a tank of its own.
Can you drain the Mercedes SLK wherever it is?
Yes, we can. We travel to the vehicle, whether it is still on the forecourt or left on your drive, and so it doesn't need to be moved or switched on.