Fair prices. Honest advice.
Your next car is waiting for you
Inspected used cars, fair prices, and personal advice in Mainz-Kastel.
Why J&J Automobile Mainz-Kastel
Fair by name, fair by nature
Fair prices
Transparent valuations and honest pricing — no hidden costs.
Quality checked
Every vehicle is carefully selected and inspected before it joins our lot.
Personal service
From your first inquiry to handover, we take the time to get it right.
Buy & Sell
Current Vehicles & Trade-Ins
Our vehicles
You can find our current stock on mobile.de. Stop by or reach out directly — we're happy to advise you in person.
Sell your car
Looking to sell your vehicle? We'll put together a fair, no-obligation offer — quickly and without hassle.
Sell your car
We buy your car — fair and hassle-free.
Fast Response
You'll get an initial assessment of your car from us within one business day.
Fair Valuation
We value your car transparently at current market rates — no negotiation tricks.
Hassle-Free Process
From first contact to handover, we personally handle all the paperwork.
Secure Payment
Payment by bank transfer or cash on handover — whichever you prefer.
Visit us
We look forward to seeing you
Send us a message
Ready for your next car?
Let's talk.
Give us a call or take a look at our current stock on mobile.de.