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  3. MERCEDES 450SL

MERCEDES Engine Motor Cylinder 300-85045H Benz 4.5L

fits model: 450sl, R107. make: Mercedes. year: 1972–1975.

300-85045h Mercedes-benz 450sl R107 Engine Motor With Accessories 4.5l 8 Cylinder Fits 1972-1975

( Manufacturer Part Number: 450SL ), ( Conditions Options: Convertible, Nat Asp, Au ), ( Genuine Oem: Yes ), ( Ipn: 300-85045h ), ( Make: Mercedes-benz ), ( Year: 1974 ), ( Manufacturer Warranty: 60 Day ), ( Engine Size: 4.5 L ), ( Type: Complete Assembly ), ( Oe/oem Part Number: 3 155390 )

Review MERCEDES benz Engine Motor Accessories 4.5l Cylinder Fits fits 450SL R107 1972–1975

The Mercedes-Benz 300-850.45 engine, also known as the M116 or R107 engine, is a 4.5-liter, straight-six cylinder motor that was produced by Mercedes-Benz between the years 1972 and 1975. This engine was used in various Mercedes models during this time, most notably the 450SL R107.

The engine block is made of aluminum alloy, which helps to keep the weight down and contributes to the overall performance and fuel efficiency of the motor. The cylinder bore measures 88.9 mm, and the piston stroke is 83.1 mm, resulting in a total displacement of 4,499.7 cc. The engine features a single overhead camshaft (SOHC) design with four valves per cylinder, resulting in a compact and efficient powertrain.

The 4.5-liter engine delivers impressive power output for its time. It produces a maximum power output of 220 horsepower at 5,750 rpm and 227 lb-ft of torque at 4,750 rpm. This power is delivered to the rear wheels through a manual or automatic transmission, depending on the specific Mercedes model.

The engine features a Bosch mechanical fuel injection system, which provides precise fuel delivery for efficient combustion. The engine also features a wet sump oil system, which helps to keep the engine cool and lubricated during operation.

The 4.5-liter engine is known for its robust and reliable design. It features a cast iron crankshaft, forged connecting rods, and forged pistons, all of which contribute to the engine's durability and long service life. The engine also features a dual exhaust system, which helps to reduce exhaust emissions and improve overall performance.

The Mercedes-Benz 300-850.45 engine is a true classic in the world of automotive engineering. Its impressive power output, compact design, and robust construction make it a favorite among Mercedes enthusiasts and collectors. Whether you're restoring a vintage Mercedes or building a high-performance hot rod, this engine is sure to provide the power and reliability you need to get the job done.

The Mercedes-Benz 450SL R107 engine, specifically the 4.5L 1972-1975 model (300-850.45), is a classic automotive component known for its power, luxury, and durability. Here are some potential pros and cons of buying this engine for your Mercedes-Benz SL project or restoration.

Pros:

1. Power: The 4.5L engine delivers substantial power, making it an attractive option for those seeking a robust performance.

2. Durability: Known for its longevity, these engines have a reputation for lasting an extended period with proper maintenance.

3. Availability: The R107 engine is relatively common, which makes finding spare parts and professional assistance relatively easier compared to rarer engine models.

4. Classic appeal: Owning and working on a classic Mercedes-Benz engine is a rewarding experience for many automotive enthusiasts.

5. Potential for improvement: These engines can be upgraded and fine-tuned to provide even better performance, making them a popular choice for custom builds.

Cons:

1. Complexity: The 4.5L engine is a complex machine with numerous components and systems, which can make maintenance and repair more complicated and time-consuming.

2. Cost: The cost of purchasing, maintaining, and repairing a 4.5L R107 engine can be substantial, especially for those on a tight budget.

3. Age: The engine is quite old, which may require more frequent maintenance and repairs due to the natural wear and tear that comes with age.

4. Fuel efficiency: Compared to modern engines, the 4.5L R107 engine is less fuel-efficient, which may result in increased fuel costs over time.

In conclusion, the Mercedes-Benz 450SL R107 4.5L engine offers a compelling combination of power, durability, and classic appeal. However, it also comes with the complexity, cost, and age-related challenges that are common with older engines. If you're looking for a powerful, long-lasting engine for your Mercedes-Benz project, this engine may be worth considering. However, it's essential to weigh the pros and cons carefully and be prepared for the additional time, effort, and resources that may be required to maintain and repair the engine.

Recommendation:

If you're set on purchasing the Mercedes-Benz 450SL R107 4.5L engine, ensure that you have a clear understanding of the engine's condition, maintenance history, and any potential issues. It's also recommended to budget for the ongoing maintenance and repair costs and consider seeking professional assistance when needed. If you're uncertain about your ability to handle the engine's complexity, it may be wise to consult with a Mercedes-Benz specialist or experienced mechanic for guidance.

Details:

Major components are stamped and may have heat sensitive tabs attached to indicated overheating that would void warranty. Parts are not covered for external fluid leaks. These extra attached parts are not covered by any warranty.

Mercedes 450SL R107 Engine Motor With Accessories 4.5L 8 Cylinder Fits 1972-1975: Review photos this is your actual part. Donor Vehicle: model: 450SL. Miles: 231000 - N/A or Unknown. Warranty covers the base component and none of other attached parts.

Many electronic modules and components require programming.

specifications grokengines:

  • for models: 450sl, R107
  • for makes: Mercedes
  • for years: 1972-1975
  • mpn: 450sl
  • conditions options: Convertible, Nat Asp, Au
  • genuine oem: Yes
  • ipn: 300-85045h
  • make: Mercedes-benz
  • year: 1974
  • manufacturer warranty: 60 Day
  • engine size: 4.5 L
  • type: Complete Assembly
  • oe/oem part number: 3 155390

returns grokengines:

  • policy: Returns Accepted
  • time: 30 Days
  • paid by: Buyer

offer grokengines:

  • started: March 9, 2026
  • availability: In Stock
  • quantity: 1
  • options: Ship-to-home
  • best offers: True
  • sold: 0

seller grokengines:

  • # reviews: 10873
  • city: Port Washington, Wisconsin
  • rating: 99.4%

general grokengines:

  • condition: Used
  • Car Truck Parts Accessories > Engines Engine Parts > Engines

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  • service: Flat Rate Freight
  • class: Freight
  • type: Fixed
  • cost: $275.00
for models: 450sl, r107, for makes: mercedes, for years: 1972-1975, conditions options: convertible, nat asp, au, genuine oem: yes, year: 1974, manufacturer warranty: 60 day, engine size: 4.5 l, type: complete assembly, oe/oem part number: 3 155390,
manufacturer: mercedes-benz, category: auto parts > car truck parts accessories > engines engine parts > engines, sku: 7588521133947604,

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1 offer $1599.89 USD
  • Offer #1: $1599.89 price + $275.00 shipping estimate = $1874.89* total. Engine Assembly Complete With Accessories No Starter, Compression Test Ran And Drove 3 155390 Options/Color: Convertible,R107,Nat Asp,4.5-8Cyl,Au.+$275.00 shipping

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