More Than 40 Years of Mercedes-Benz Repair Experience
Mercedes-Benz vehicles have changed enormously over the last four decades. A&B Import Auto has been here through those changes.
For more than 40 years, our Fort Collins shop has serviced Mercedes-Benz vehicles—from the durable mechanical Mercedes of earlier generations to today’s turbocharged, direct-injected, electronically controlled luxury cars and SUVs.
That history matters. Modern Mercedes-Benz repair requires sophisticated diagnostic equipment and current technical information, but equipment alone does not replace experience. Understanding how Mercedes vehicles age, how their systems interact, and how to distinguish the cause of a problem from the symptom comes from years of actually working on them.
Today, A&B Import Auto provides comprehensive Mercedes-Benz maintenance, diagnostics and repair for drivers throughout Fort Collins and Northern Colorado.
Whether your Mercedes needs Service A or Service B, has a warning message on the dash, is developing an oil or coolant leak, has an AIRMATIC suspension concern, or simply doesn’t drive the way it should, our goal is straightforward:
Diagnose it accurately, explain it clearly, repair it correctly, and help you get the longest useful life possible from your Mercedes.
Why Choose A&B for Mercedes-Benz Service & Repair?
More Than Four Decades of Mercedes Experience
We’ve been servicing Mercedes-Benz vehicles in Fort Collins for more than 40 years.
That gives us experience spanning multiple generations of Mercedes engineering—not simply familiarity with one current platform.
Mercedes-Capable Diagnostics
Modern Mercedes vehicles contain dozens of interconnected control modules. A warning light or malfunction can involve far more than a generic fault code.
We use professional diagnostic equipment, technical information and testing procedures appropriate for modern European vehicles so our technicians can investigate the system behind the fault rather than simply replacing the part named in a code.
5-Year / 50,000-Mile Warranty
We stand behind qualifying repairs with a 5-year / 50,000-mile parts and labor warranty.
When comparing repair facilities, we encourage Mercedes owners to look beyond the headline warranty period and ask what is actually covered—including both parts and labor.
Open Seven Days a Week
Cars don’t limit their problems to Monday through Friday.
A&B is open seven days a week, with technicians and diagnostic capability available on weekends as well as weekdays.
Courtesy Transportation
Taking care of a Mercedes shouldn’t require rearranging your life.
Depending on availability and service needs, we offer:
- Courtesy loaner vehicles
- Local shuttle service
- Vehicle pickup and delivery
- After-hours vehicle pickup options
Quality Parts and Fluids
Mercedes vehicles are engineered around specific material, fluid and component requirements.
We use genuine Mercedes-Benz components where appropriate along with high-quality OEM and aftermarket parts selected for the application, rather than choosing parts based solely on the lowest purchase price.
Complete Mercedes-Benz Maintenance, Diagnosis & Repair
Mercedes has its own engineering vocabulary, service systems and common failure patterns. Our technicians work with those systems every day.
Mercedes Service A & Service B
If your dashboard says Service A Due or Service B Due, the letter is only part of the story.
Mercedes maintenance requirements can vary according to model, engine, age, mileage and the additional service codes stored by the vehicle.
We perform Mercedes Service A and Service B maintenance and can determine which additional maintenance items are actually due rather than treating every Mercedes service visit as a generic package.
Depending on the vehicle and interval, maintenance may involve:
- Engine oil and filter service
- Brake inspection
- Brake-fluid replacement
- Cabin and engine air filters
- Spark plugs
- Transmission service
- Drivetrain fluids
- Vehicle inspections
- Model-specific maintenance items
- Maintenance indicator reset
Our goal is to separate scheduled maintenance, repairs that are actually needed, and items that can reasonably be monitored so you understand what you’re approving.
Mercedes-Benz Diagnostics
Good Mercedes repair begins with good diagnosis.
Modern Mercedes-Benz vehicles use interconnected control modules to manage the engine, transmission, drivetrain, suspension, body electronics, safety systems, climate control and many convenience features.
We diagnose concerns including:
- Check-engine lights
- Warning messages
- Misfires and rough running
- No-start and intermittent starting problems
- Communication and network faults
- Battery drains
- Charging-system warnings
- Transmission faults
- Suspension warnings
- Turbocharger and boost faults
- Fuel-system problems
- Electrical accessories
- Intermittent electronic problems
Reading a fault code is not the same thing as diagnosing a vehicle. Whenever necessary, we use testing, measurements, wiring information, live data and system knowledge to determine why the fault occurred.
4MATIC AWD Diagnosis & Repair
Mercedes-Benz 4MATIC systems add additional drivetrain components and controls that require proper maintenance and diagnosis.
Symptoms such as vibration, binding, unusual drivetrain noises, warning messages or fluid leaks can originate from several different parts of the AWD system.
We diagnose and repair Mercedes 4MATIC concerns while looking at the drivetrain as a complete system rather than assuming the first apparent component is responsible.
AIRMATIC Air Suspension Repair
Mercedes-Benz AIRMATIC provides the smooth, controlled ride many owners associate with the brand, but age and mileage can eventually produce problems with air springs, struts, compressors, valves, lines, sensors or system controls.
Common symptoms include:
- Vehicle sitting low after parking
- One corner lower than the others
- Suspension warning messages
- Compressor running excessively
- Very firm or unusual ride quality
- Vehicle failing to raise properly
AIRMATIC repairs can become expensive when parts are replaced without confirming the source of the problem. We diagnose the system before determining what actually needs repair.
ABC Hydraulic Suspension
Certain Mercedes-Benz models use Active Body Control (ABC) hydraulic suspension rather than conventional springs or AIRMATIC.
These sophisticated systems require a different diagnostic and repair approach. Where applicable, we can evaluate ABC-related hydraulic leaks, suspension faults and ride-height concerns and determine the appropriate repair path for the vehicle.
Mercedes Engine Oil Leaks
Oil leaks are common across a number of Mercedes engines, but the source varies considerably by engine family and generation.
We diagnose leaks involving areas such as:
- Valve covers
- Camshaft-related seals and components
- Oil filter housings
- Oil coolers
- Front covers and timing components
- Crankcase ventilation systems
- Other engine seals and gaskets
The highest visible point of a leak is often more useful diagnostically than where the oil eventually reaches the bottom of the vehicle. We identify the source before recommending repairs.
Crankcase Ventilation / PCV Problems
Mercedes crankcase ventilation problems can cause far more than a simple check-engine light.
Depending on the engine and failure, a crankcase ventilation fault may contribute to:
- Oil leaks
- Abnormal crankcase pressure or vacuum
- Whistling noises
- Rough idle
- Mixture faults
- Oil consumption
- Check-engine lights
Because crankcase pressure affects engine seals and engine operation, proper diagnosis matters before replacing leaking components alone.
Timing Chains, Camshaft Adjusters & Timing Components
Mercedes has used numerous timing-chain and variable-camshaft systems across its engine families.
Problems can involve chains, guides, tensioners, camshaft adjusters, actuators, magnets, sensors, wiring or related components depending on the engine.
Symptoms may include:
- Check-engine lights
- Camshaft timing faults
- Startup rattles
- Poor performance
- Rough operation
- Correlation faults between the crankshaft and camshafts
These are areas where Mercedes-specific knowledge matters because similar symptoms can have very different causes.
Cooling-System Repair
Mercedes cooling systems operate under demanding conditions and contain numerous plastic, aluminum, electronic and mechanical components that change from platform to platform.
We diagnose and repair:
- Water pumps
- Thermostats
- Radiators
- Expansion tanks
- Coolant hoses
- Coolant leaks
- Temperature-control faults
- Overheating concerns
A small coolant leak is worth investigating before it becomes an overheating event.
Turbocharger & Boost-Control Diagnosis
Turbocharging is now common across the Mercedes-Benz lineup, including many AMG models.
A low-boost fault doesn’t automatically mean the turbocharger itself has failed.
Boost problems can involve:
- Turbochargers
- Wastegates or actuators
- Charge-air plumbing
- Vacuum or pressure controls
- Sensors
- Air leaks
- Electronic controls
Our approach is to test the system and determine why boost isn’t matching the engine computer’s requested value before recommending major components.
Direct-Injection Fuel-System Diagnosis
Many modern Mercedes engines use high-pressure direct fuel injection.
Fuel-system concerns can produce difficult symptoms including long cranking, misfires, rough running, mixture faults, loss of power and warning lights.
Proper diagnosis may require evaluating the low-pressure and high-pressure sides of the system along with injectors, sensors, electrical controls and engine-management data.
Intake & Air-Management Problems
Depending on engine design, Mercedes vehicles may use electronically controlled throttle systems, intake runners, actuators, valves and other air-management components.
When one of these systems fails, simply replacing the component associated with a fault code isn’t always the correct answer.
We diagnose the mechanical and electronic operation of the system before determining the repair.
7G-Tronic & 9G-Tronic Transmission Service and Diagnosis
Mercedes automatic transmissions require the correct fluid, service procedures and diagnostic approach.
We service and diagnose Mercedes transmissions including 7G-Tronic and 9G-Tronic applications.
Depending on the transmission and symptoms, problems may involve fluid condition, electronic controls, valve-body components, conductor plates, sensors or internal mechanical concerns.
Transmission warnings, harsh shifts, delayed engagement or unusual shifting behavior should be diagnosed before assuming the transmission needs complete replacement.
Mercedes Electrical & Network Diagnostics
Mercedes-Benz has long been an early adopter of sophisticated vehicle electronics.
That sophistication makes proper electrical diagnosis especially important.
We investigate concerns involving:
- Control modules
- CAN and vehicle networks
- Wiring
- Sensors
- Parasitic battery drains
- Intermittent electrical faults
- Warning messages
- Convenience features
- Starting and charging systems
Electrical problems are one of the clearest examples of why Mercedes-capable diagnostics matter. An apparent module failure may actually be caused by power supply, wiring, communication or another component elsewhere on the network.
Main Battery, Auxiliary Battery & Charging Systems
Mercedes vehicles may use multiple batteries and sophisticated charging strategies.
If your Mercedes displays an auxiliary battery malfunction, battery warning or starting-system message, we can test the battery and charging system rather than automatically replacing parts based on the dashboard wording alone.
Mercedes AMG Service & Repair
AMG vehicles deserve more than generic Mercedes maintenance.
Higher-output engines, upgraded brakes, performance suspension, specialized drivetrain components and tighter operating demands change both service requirements and the consequences of deferred maintenance.
We service and diagnose Mercedes-AMG vehicles while taking those differences into account.
Whether you drive an AMG sedan, coupe or SUV, we understand that maintaining the performance character of the vehicle matters just as much as turning off the warning light.
Mercedes-Benz Models We Service
Our technicians work on Mercedes-Benz cars and SUVs across a broad range of generations, including:
- C-Class
- E-Class
- S-Class
- CLA
- CLS
- GLA
- GLB
- GLC
- GLE
- GLS
- G-Class
- SL
- AMG models
- And many other Mercedes-Benz vehicles
From an older Mercedes that has been on Colorado roads for decades to a modern turbocharged 4MATIC vehicle packed with electronics, we approach each vehicle according to its actual engineering and service requirements.
A Mercedes Repair Shop With Roots in Fort Collins
A&B Import Auto isn’t a new shop that recently decided to specialize in European vehicles.
We have spent more than four decades working on Mercedes-Benz and other European cars in Fort Collins.
During that time, Mercedes has transitioned from primarily mechanical fuel injection and hydraulic controls to sophisticated computerized engine management, direct injection, turbocharging, electronically controlled AWD, networked modules and active suspension.
Our job has been to evolve with the cars.
That combination—long-term experience with the brand and continued investment in modern diagnostic capability—is an important part of how we care for Mercedes-Benz vehicles today.
Mercedes-Benz Service in Fort Collins & Northern Colorado
A&B Import Auto is located at 1943 E. Lincoln Avenue in Fort Collins, Colorado and serves Mercedes-Benz owners throughout Fort Collins, Loveland and Northern Colorado.
We’re open:
Monday–Friday: 7:30 AM–5:30 PM
Saturday–Sunday: 8:00 AM–5:00 PM
Whether you’re looking for an alternative to the Mercedes-Benz dealership, need a difficult problem diagnosed, or simply want a long-term shop that can help you maintain your vehicle properly, we’d be happy to help.
Schedule Your Mercedes-Benz Service
From routine Service A and Service B maintenance to AIRMATIC, 4MATIC, AMG, electrical, engine, transmission and advanced diagnostic work, A&B Import Auto provides comprehensive Mercedes-Benz service under one roof.
You’ll also have the backing of our 5-year / 50,000-mile warranty on qualifying repairs, plus loaners, shuttle service, pickup and delivery options, and appointments seven days a week.
Call A&B Import Auto at 970-221-4700 or schedule your Mercedes-Benz service online.
Frequently Asked Questions About Mercedes-Benz Repair
Do I have to take my Mercedes-Benz to the dealership for service?
No. An independent repair facility with appropriate equipment, information, parts and experience can perform most Mercedes-Benz maintenance and repair services. A&B Import Auto has serviced Mercedes vehicles in Fort Collins for more than 40 years.
Does A&B perform Mercedes Service A and Service B?
Yes. We perform Mercedes Service A and Service B and review the vehicle’s model, mileage, service history and applicable maintenance requirements to determine what is actually due.
Can you diagnose Mercedes warning lights?
Yes. We use professional diagnostic equipment to communicate with Mercedes vehicle systems and perform additional testing as needed. A fault code is the beginning of diagnosis rather than automatically a reason to replace a component.
Does A&B repair Mercedes AIRMATIC suspension?
Yes. We diagnose AIRMATIC concerns involving ride height, air leaks, compressors, struts or air springs, controls and related components.
Do you work on Mercedes 4MATIC vehicles?
Yes. We service and diagnose Mercedes-Benz 4MATIC AWD vehicles and related drivetrain concerns.
Does A&B work on Mercedes-AMG models?
Yes. We service and repair many Mercedes-AMG models and account for the additional maintenance and diagnostic requirements of Mercedes performance vehicles.
What warranty does A&B offer on Mercedes repairs?
Qualifying repairs at A&B Import Auto are backed by a 5-year / 50,000-mile parts and labor warranty. Ask our team about the coverage applicable to your specific repair.
Is A&B Import Auto open on weekends?
Yes. Our Fort Collins repair shop is open seven days a week, including 8:00 AM–5:00 PM Saturday and Sunday.