Contacts
Louden Motorcar Services, Inc.
11454 Reeder Road, Dallas, TX 75229
Mon To Fri: 07:30 AM – 05:30 PM
Sat - Sun: Closed
Call today for an appointment: 972-241-6326
Theresa - theresa@loudenmotorcars.com
Jon - jon@loudenmotorcars.com
Irving mileage arrives in airport-sized chunks. Out to DFW from Valley Ranch, back through the Urban Center, then SH-114 stiffens at the construction seams and a quick errand turns into a long idle with the A/C on maximum. That is heat-soak duty. Transmission fluid, refrigerant and coolant all keep working while the air moving through the radiator slows to almost nothing. Louden Motorcar Services has kept Mercedes-Benz, Porsche, BMW and MINI running out of northwest Dallas since 1977. September rarely lets up around here.
Our experienced technicians deliver dealership-quality maintenance and diagnostics at competitive prices. We specialize in European auto repair in Irving, providing expert service for German vehicles such as:
An AIRMATIC car tells on itself in the morning. You walk out to a W221 or W222 sitting low on one corner, it pumps itself level by the time you reach MacArthur Boulevard, and you decide it fixed itself. It didn't. The compressor is now doing a leaking air strut's work on every trip, and those compressors fail loudly, at the worst moment.
Sensors are the other theme. A Mercedes will sit on a fault for weeks without lighting the dash, which is why we pull module-level data with dealership-level equipment rather than reading a generic code and guessing.
Automatic fluid ages by heat, not by odometer. A 7G-Tronic that shifts clean on the open road will flare between second and third in the airport crawl, and the first honest symptom is a shudder through the floor rather than a code. Feel it once, mention it.
→ transmission repair for German cars
Leaks are the other half of the story. Mercedes automatics seep at the electrical connector plug and along the pan gasket, and a red-brown spot on a Valley Ranch driveway is worth reading before the fluid level drops far enough to cook a clutch pack.
A 911 that leaves an Urban Center garage once a week has its own failure list. Rubber hardens, tires flat-spot against hot concrete, and the battery sags far enough that the alarm module starts inventing faults nobody can reproduce. Coolant bites hardest. The plastic coolant pipe joints on the water-cooled V8 cars left the factory glued, and a long sit followed by a hot run up Loop 12 is exactly when one lets go.
Drive it more, or plan for it. If a Cayenne or Panamera lives on a trickle charger between Toyota Music Factory nights, service it by the calendar instead of the odometer.
Skip SH-114 if you can. Loop 12 north to Northwest Highway works, and so does Irving Boulevard east onto Harry Hines Blvd, which puts Love Field on your right and Bachman Lake ahead before you turn onto Reeder Road. The bay doors are at number 11454.
Early-bird and after-hours drop-off exist for people whose day starts at the airport. The car waits in our bay instead of your driveway, and 24-hour towing is there for the days it doesn't roll.
Our mechanics understand that maintenance is critical to getting the best performance that your car has to offer and that’s why we use all of the latest available tools and equipment to provide the most accurate service possible. Our services include:
Check Engine LightWe guarantee all of our services and repairs will have your car looking and feeling like new with each and every visit.





Louden Motorcar Services, Inc. — 11454 Reeder Road, Dallas, TX 75229, near Harry Hines Blvd and Royal Lane.
Monday through Friday, 7:30 AM to 5:30 PM. Closed Saturday and Sunday.
Send the year, the model and what the car is doing, and we will book it to a technician who knows that failure by ear.
Louden Motorcar Services sits at 11454 Reeder Road in northwest Dallas, a straight run east on Irving Boulevard or Loop 12. ASE-certified technicians with Master and Advanced-level certifications handle Mercedes-Benz work, and the facility holds the ASE Blue Seal of Excellence.
Usually it is refrigerant loss from a leaking condenser, hose or seal rather than a failed compressor. DFW averages 20.2 days a year at or above 100°F, so a system that is even slightly low quits first in slow traffic.
Look for red-brown drops under the middle of the car, a burnt smell after a long crawl, or shifts that hesitate when the fluid is hot. The connector plug and pan gasket are the usual sources.
Yes — Porsche is one of the four marques we work on, along with BMW, Mercedes-Benz and MINI. Cooling system work and brakes lead the list on cars that spend most of the week parked.
We deal directly with extended warranty and service contract providers, and financing is available through a third-party application with CFNA. Bring your contract details when you drop the car off.
Louden Motorcar Services, Inc.
11454 Reeder Road, Dallas, TX 75229
Mon To Fri: 07:30 AM – 05:30 PM
Sat - Sun: Closed
Call today for an appointment: 972-241-6326
Theresa - theresa@loudenmotorcars.com
Jon - jon@loudenmotorcars.com