We service and repair Mercedes-Benzs of every age at our Birnam, Dunkeld workshop. The jobs we see most on Mercedes-Benzs are adblue system and nox sensor faults and injector seal leaks (om651), so we know where to look before the car is even on the ramp. Interim and full servicing follows Mercedes-Benz's manufacturer schedule using supplier-verified parts, so cars still under warranty stay covered. Our diagnostic kit reads Mercedes-Benz-specific fault codes properly rather than guessing at parts, and we carry out ECU remapping tuned for how the vehicle is actually driven. Book a service or MOT online, or call 01350 727 276 for a quote.
Mercedes-Benz Servicing in Birnam, Dunkeld & Perthshire
Looking for a trusted Mercedes-Benz garage in Perthshire? Bob's Mechanical Repairs provides expert servicing, MOT testing, diagnostics and repairs for all Mercedes-Benz models. Whether you drive a A-Class, B-Class, C-Class, E-Class, GLA or any other Mercedes-Benz, our experienced team has the skills and equipment to keep your car running at its best. We're conveniently located in Birnam, Dunkeld, and serve customers across Dunkeld, Birnam, Luncarty, Aberfeldy, Bankfoot, Perth, Blairgowrie, Pitlochry, Blair Atholl, Stanley.
Mercedes-Benz Service Intervals — What the Schedule Actually Says
Mercedes alternates Service A (basic, oil and inspection) and Service B (fuller, including brake fluid and cabin filter), each at roughly 15,500 miles or 12 months on modern cars. ASSYST tells you which one is due; brake fluid is every 2 years. We service to the manufacturer schedule using supplier-verified parts, stamp your book, and record the work so your service history stands up when you come to sell. Every Mercedes-Benz service includes all parts as listed, and anything extra we find is reported to you with a price before we touch it — no surprises on the bill.
Interim & Full Mercedes-Benz Service Options
You can opt for a Mercedes-Benz interim service or a Mercedes-Benz major (full) service at our garage in Birnam, Dunkeld, Perthshire. An interim service is ideal if you cover high mileage or drive in demanding conditions — it covers the essentials like oil and filter change, fluid top-ups, and a safety inspection. A full service is more comprehensive and includes everything in the interim service plus spark plugs, air filter, fuel filter (diesel), brake inspection, and a thorough check of all mechanical components. Whichever you choose, our qualified technicians use the latest kit and equipment to carry out your Mercedes-Benz mechanical repairs to the highest standard.
Mercedes-Benz MOT Testing — Class 4
We are a DVSA-approved MOT testing station carrying out Class 4 MOT tests for all Mercedes-Benz models. The MOT test checks that your Mercedes-Benz meets road safety and environmental standards. If your Mercedes-Benz needs an MOT, you can book online or call us on 01350 727 276. We'll send you a reminder when your MOT is due so you never miss a deadline. If your Mercedes-Benz fails its MOT, we'll give you a clear, honest quote for the repairs needed and can often carry out the work the same day.
Common Mercedes-Benz Faults We See in the Workshop
These are the Mercedes-Benz problems that actually come through our doors, not a generic list. AdBlue system and NOx sensor faults: Post-2015 diesels throw AdBlue warnings and countdowns to no-start. It is usually a NOx sensor or the metering pump rather than the fluid itself, so diagnose before you buy parts. Injector seal leaks (OM651): The 2.1 diesel in the C-Class, E-Class, Sprinter and Vito leaks combustion gases past hardened copper injector seals, giving a diesel smell and a chuffing noise on cold start. Airmatic suspension: Air struts and the compressor on E-Class and larger models leak with age — the car sits down overnight on one corner. Compressor burnout follows if the leak is left. Balance shaft wear (older M272 petrol): A known issue on mid-2000s V6 petrols; shows as a timing correlation fault code. Expensive, so worth knowing about before buying a used one. When a warning light appears on your Mercedes-Benz, our diagnostic kit reads live sensor data as well as fault codes, so we can tell the difference between a failing part and a sensor reporting one. That's how we avoid fitting parts that were never broken.
Mercedes-Benz Brake Repairs & Replacement
Your Mercedes-Benz's braking system is the most important safety feature on your car. We carry out all Mercedes-Benz brake work including brake pads, brake discs, calipers, brake fluid changes, and handbrake adjustments. We only fit quality branded parts to your Mercedes-Benz and always inspect the full braking system — not just the component you came in for. If your Mercedes-Benz brakes are squealing, grinding, or the pedal feels soft, bring it in for a free brake check.
Mercedes-Benz Engine Remapping & Tuning
Want more performance and better fuel economy from your Mercedes-Benz? Our ECU remapping service can unlock the hidden potential in your Mercedes-Benz's engine. We remap Mercedes-Benz vehicles using OBD and BDM tuning methods to safely increase power, torque, and throttle response whilst also improving fuel economy. This is particularly effective on turbo-diesel Mercedes-Benz models where savings of up to 20% on fuel are possible. Every Mercedes-Benz remap is tailored to your specific vehicle and driving requirements.
Mercedes-Benz Clutch, Timing Belt & Major Repairs
We handle all major mechanical repairs for Mercedes-Benz vehicles. Mercedes-Benz timing belt replacement is critical — if your Mercedes-Benz's timing belt snaps it can cause catastrophic engine damage costing thousands to repair. We'll check your Mercedes-Benz's service schedule and advise when the belt is due. We also carry out Mercedes-Benz clutch replacement, dual mass flywheel repairs, turbo replacement, head gasket repairs, and suspension work. Whatever the job, we'll give you an honest quote before we start.
Mercedes-Benz Owner's Manual & Service Schedules
Keeping track of your Mercedes-Benz service schedule is essential for maintaining your car's value and reliability. Your Mercedes-Benz owner's manual contains vital information about service intervals, warning light meanings, fuse box locations, tyre pressures, and fluid specifications. If you've lost your Mercedes-Benz manual or want to check something quickly, you can view your Mercedes-Benz owner's manual online for free at Car Manual All Makes — they have comprehensive manuals for all Mercedes-Benz models including the A-Class, B-Class, C-Class, E-Class, GLA, GLC, GLE, CLA.
Your Mercedes-Benz Warranty Is Safe With Us
European Law changes effective 2003 mean that independent garages such as Bob's Mechanical Repairs are now able to service your vehicle with OEM parts (Original Equipment Manufactured). All services completed at Bob's Mechanical Repairs will not affect your Mercedes-Benz manufacturer's warranty. Under the Block Exemption Regulation, you are legally entitled to have your Mercedes-Benz serviced at any independent garage without voiding your warranty, provided we use genuine or equivalent quality parts — which we always do. This means you can enjoy main dealer quality service at independent garage prices.
Booking Your Mercedes-Benz In — What to Expect
Tell us the model and roughly what it's doing and we can usually narrow it down before you arrive. On the A-Class, B-Class, C-Class, E-Class we already know the weak points, so a diagnostic slot is spent confirming a suspicion rather than starting from scratch. If it turns out to be one of the bigger jobs on this make — adblue system and nox sensor faults; injector seal leaks (om651); airmatic suspension; balance shaft wear (older m272 petrol) — we'll price it in full, in writing, before anything is stripped down. Where a repair isn't worth the money on the age and condition of the car, we'll say that too. Ring 01350 727 276 or book online, and if you're not local to Birnam we'll tell you honestly whether the job is worth the trip.
Why Choose Bob's Mechanical Repairs for Your Mercedes-Benz?
Bob has been in the motor trade for 32 years and has extensive experience working on all Mercedes-Benz models. Bob's note on Mercedes-Benzs: "The ASSYST countdown is not a suggestion — Mercedes diesels are unforgiving about stretched oil changes, and the OM651 in particular wants clean oil." Our garage is equipped with the latest diagnostic equipment and tools specifically designed for modern Mercedes-Benz vehicles. We pride ourselves on honest, transparent pricing with no hidden costs. We explain everything in plain English and will never carry out work without your approval. Our customers across Dunkeld, Birnam, Luncarty, Aberfeldy, Bankfoot, Perth, Blairgowrie, Pitlochry, Blair Atholl, Stanley keep coming back because they trust us to look after their Mercedes-Benz properly. Check our Google reviews — we're consistently rated 5 stars.
Mercedes-Benz models we work on
- A-Class
- B-Class
- C-Class
- E-Class
- GLA
- GLC
- GLE
- CLA
Servicing your Mercedes-Benz without losing the warranty
Under EU Block Exemption rules, carried into UK law, you do not have to use a main dealer to keep a manufacturer warranty valid. An independent garage can service your Mercedes-Benz to the manufacturer schedule using matching-quality parts and correct-spec oil, stamp the book, and the warranty stands. That usually costs less than the dealer price for the same work.
Bob's Mechanical Repairs is an independent family-run garage in Birnam, Dunkeld, Perthshire, with 32 years of Bob's experience on the tools across every mainstream make. Diagnostics, servicing, brakes, clutches, timing belts and MOT preparation are all handled in-house, with the fault explained in plain English before any work is agreed.