Getting car credit – no fixed income, but high down payment

Hello, I have the following concerns. Since I am slightly busy, I usually don’t get a loan to finance a car. Let’s say I have enough money in the account to pay a car cash, could I still try to ask for a loan? I could finally also pay a slightly higher deposit, nevertheless the question is whether a dealer would even get involved in it, because so far the money in the account is still not sure, since it theoretis I don’t want to spend so much once in a while. The car has a value of approx.18,000 euros and as far as the deposit is concerned, I would be willing to spend a maximum of 12,000 euros. Have a nice lunch!