Monday - Friday: 7:30 AM – 5:00 PM • Saturday & Sunday: Closed
List of Services
ROUNDEL MOTOR WERKS is your premier dealership alternative for the service, maintenance and repair of European vehicles on Cape Cod and Plymouth County, Opened in Sandwich MA in 2013, RMW has the factory training, the experience and the necessary equipment to maintain or restore your confidence and pride in your ultimate driving machine.
General Services:
- Coding / programming
- Diagnosis and repair
- Mechanical repairs
- Electrical repairs
- Air conditioning repairs

- Wheels and tires, including rim straightening and refinishing
- Run flat tire service
- Road force wheel balancing
- Sunroof repair including panoramic roofs
- Audio, navigation and phone systems
- Maintenance / service
- Convertible Top Repair
- Four wheel alignments including active steering and rear steering vehicles.
- Exhaust repairs / upgrades
- Leaks
- Noises
What about the 10,000 mile oil change?
Luxury German-made vehicles have nearly always had extended oil life recommendations. These new vehicles with "full maintenance warranty" limit free oil services to 1 per year or when the service indicator tells you - this averages around 12-16k miles. We believe the engine will not fail prematurely due to the extended miles on the oil; however, the long-term life of the engine might be extended if more frequent servicing is done.
It's very important to frequently inspect all fluids, belts, tires and hoses. A visit to RMW every 6 months or every 5,000 miles to change the oil and filter, adjust tire pressures and perform a comprehensive inspection can save you money over the life of your BMW, Mercedes-Benz, Mini Cooper, Audi and SAAB. It could also save you the inconvenience of a breakdown. Call us for an appointment.
Lifetime transmission fluid - BMW Only
Since 1993, BMW has been sealing automatic transmissions and recommending "no servicing for the life of the transmission". It is true that transmission fluids do not live in the same harsh environment as the engine oil, so extended services are reasonable. However, it may be more prudent to replace the transmission fluid and filter every 75,000 miles to provide additional assurance that the BMW owner will not experience transmission problems. As with most repairs, RMW can perform the transmission service the same day.
Brake Fluid
The brake system of your German-made vehicle uses a DOT 4, glycol-based hydraulic fluid. This fluid is "hygroscopic" which means it will absorb moisture over time. This moisture lowers the boiling point of the fluid and causes internal corrosion in the brake system. Once the fluid reaches boiling point under heavy braking, moisture becomes steam. Steam is gaseous in form, which equates to air in the brake system meaning a "soft or spongy pedal" until it cools to under the boiling point where it returns to liquid again.
That's why the fluid should be replaced when brake repairs are done or every two years (regardless of mileage) as preventive maintenance. RMW uses a pressure bleeding system to ensure all of the fluid is replaced and no air is introduced.
Coolant
The coolant in your engine serves three important purposes. One is to protect your engine from damage from freezing. The second is to keep the engine cool, and here that is far more important. We all need to be cool, right? The third is just as important, and that is to protect the engine from corrosion. One specific measure of protection is pH. If you have ever had a swimming pool then you know about pH. pH is a measure of the acidity or alkalinity of a solution. Liquids with a pH less than seven are considered acidic, while those with a pH greater than seven are considered basic (alkaline). A pH of 7.0 is neutral (like pure water).
The coolant pH in your BMW, Mercedes-Benz, Mini Cooper, and Audi started at 8.5 and after a couple years will dip into the 6 range. At this point it's doing more harm than good. Gaskets, hoses and seals are no longer being protected - they're being eaten! It's a slow process, but irreversible. It is very important to replace the coolant with the correct type every three years or so. At RMW we use the factory zero phosphate coolant and can replace it in about an hour.
Power Steering
The power steering fluid of your BMW, Mercedes-Benz, Mini Cooper, Audi and SAAB is just as important as the coolant or brake fluid.
The fluid is used to assist the driver when steering, but just as importantly, it lubricates the steering gear that turns the wheels. It is pumped from its reservoir by a belt driven hydraulic pump through hoses and then to the steering gear. After the fluid passes through the gear it goes through more hoses to the cooler and then back to the fluid reservoir.
The absence of a filter can cause problems; if a pump or gear starts to fail, the debris is sent through the entire system, resulting in an expensive repair. The fluid, when new, helps condition the hoses and seals within the system. After time, the conditioners break down, resulting in hoses and seals that become hard and brittle.
Power steering hose replacements are among the most common German-made vehicle repairs. The manufacturers have no recommended service interval for replacing the power steering fluid. At RMW we recommend changing the power steering fluid every 30k miles. Call us for an appointment.
Brake System Service
Why original brake parts for your Luxury German-Made Vehicles?
Over the years we have tried many different variations of brake components on BMWs,, Mercedes-Benz, and Audi and what we have learned is that the original brake rotors and linings perform better for street use than any other combination. The superior cold performance and lack of any noise or vibration makes them ideal for daily driving.
The only drawback to original equipment is the dark grey brake dust caused by the high carbon linings. After-market linings can cure the dust problem but quite often create other issues. A shaking steering wheel as you slow from freeway speeds, and even when not braking, can often be cured with new brake discs/rotors.
As the non-original rotors heat cycle from driving, they often become warped like an lp record. The BMW, Mercedes-Benz, and Audi rotors are cast from very soft and porous steel; they dissipate heat very uniformly, and when the factory linings are used, the pores at the surface of the rotors collect and hold carbon from the linings to help adhesion and minimize vibrations (noise).
Ever notice the way the rotors on your BMW, Mercedes-Benz, or Audi rust in what seems like minutes after a car wash? Also, sometimes squeaks can be heard during a rainy day. This is a result of washing the carbon away. Our recommendation is original brakes on your German-made luxury car unless you intend to compete. Remember to go easy on your new brakes for the first 200 miles. This will harden the lining materials and maximize the performance and longevity of the linings. Most brake jobs can be done the same day at Roundel Motor Werks. Call us for an appointment.
"At RMW, Our goal is to maintain and repair your BMW quickly and accurately without the costs and time associated with taking a vehicle to the dealer. We have invested in the factory service equipment to do so. We specialize in BMW, and know them well. Give us a chance and I know you will be satisfied."
- Pat Martin, Owner
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