Book Mercedes-Benz battery service at our Haines City shop. Same technicians, same bays, every time you come in.
31600 U.S. 27, Haines City, FL 33844
Monday to Friday, 7:30 AM to 5:30 PM
Heat is harder on a battery than cold is. Cold weather gets the blame because that is when a weak battery finally refuses to start the car, but the damage usually happened months earlier, in July. Under the hood in Central Florida a battery spends most of the year at temperatures that speed up the chemistry inside it, evaporate fluid out of the cells, and build sulfate on the plates. Sulfate is the chalky layer that keeps a battery from accepting and holding a full charge. So a battery down here can look fine on a mild morning and still be well past its useful life.
Testing tells us more than age does. We load test the battery and watch what the voltage actually does under demand, check state of charge, and see how it behaves with the engine running and after the car has been sitting. Then we pull the terminals, clean the posts and clamps, and look at the white or green crust that quietly adds resistance to every circuit the battery feeds. A loose or corroded connection can act exactly like a dead battery, and it costs nothing to rule out.
Here is the part that saves people money. A battery that keeps dying is often not the problem. If the charging system is not putting voltage back in, a brand new battery will die the same way in a few weeks. If something in the car is drawing current after you shut it off, same result. So before we sell you a battery, we check charging output and look for a drain. Sometimes the answer really is a battery. Sometimes it is a charging or wiring issue, and a new battery would only have reset the clock on the same complaint. Either way you get the test numbers and the inspection photos on your phone, so you can see what we saw.
The technician found a thermostat stuck open, which was the main concern behind the check engine light.
Read the full jobAfter the repairs, the oil leak was resolved, and the vehicle's oil level warning light no longer appeared.
Read the full jobJohnnies is currently the only shop I will let service my Mercedes benz c300. I take very good care of my car and I use Johnnies because they treat my car as if it were their own. Pricing is better than other places nearby, their customer service is exceptional and the lounge area is 5 star hotel quality.
Shane Wise
Verified Google Review
It is hard to know where to begin when you are overwhelmed by professionalism and finding a garage with folks that care and listen. I can verify that the other reviews commenting on the inside of the “waiting room “for lack of a better term is unlike anything I have seen before. Snacks, relaxer chairs😉, television , the shops history listed on the wall … and best of all they’re honest. I brought in a 2016 Mercedes Metris with a breaking issue. I was genuinely concerned only because we had owned the vehicle for less than two months and it could have been anything. Usually…with any MB, anything that breaks = lots and lots of money to repair! The Mercedes-Benz dealerships were quoting us anywhere from two to $300 an hour just for a look and that that much an hour for labor! 😖 Their service departments are so overwhelmed and overbooked that one of them only had one mechanic for 76 Metris’s on site that needed repair. 😖Need I say more. So I looked online and saw the reviews on Johnny’s. From the first call … it was great!!! we drove down and the gal that took care of us and checked us in was wonderful. I sent them some additional potential recalls that may or may not have been relevant to the issue with my vehicle. Had I done that to another repair shop it probably would have been completely disregarded ignored and probably deleted . However, that was not the case here. Everything I found and texted to them wad was responded to with courtesy and a “thank you”.. wow! We were treated with good old-fashioned politeness that I haven’t seen or experienced in years to be totally honest. So now let’s talk about price. The initial problem could have possibly been would a small fortune to repair at a Mercedes-Benz shop. However, the issue they found was easily and quickly repaired, and I also had them do a preventative brake flush for the system as well. To get out of a shop with a Mercedes-Benz under $300 is rate these days. But Johnnys did it. I am extremely grateful. When I thought the reviews were too good to be true well guess what they’re not. They are true. So, if you have any issues at all before you spend a small fortune at a dealership charging anywhere from two to $300 an hour go to Johnny’s first. It was definitely worth the ride from Solivita.
ann miller
Verified Google Review
Our Mercedes C280 needed the A service. Friendly staff, short wait, and reasonable price. Do recommend this shop.
Hartmut Berns
Verified Google Review
Aug 10, 2026 · 7 min read
Why Florida heat is what actually wears a car battery out, the warning signs in the order you'll notice them, how to jump start safely, and what matters on replacement day.
Read article
Oct 2, 2026 · 7 min read
September in review: we completed 1,181 repair orders across our six Central Florida shops, led by diagnostics and oil changes. Here's what came through, what it says about the season, and what to watch next.
Read articlePick whichever one is easiest to drive to.
ASE Certified Technicians
ASE certified techs working on your vehicle
Flexible Drop-Off Hours
Convenient service options
20+ Years
2 decades of trusted service
