Mercedes 300D Engine | Used OM617.952 3.0L I5 Turbo Diesel W123
$2,165.00
At a Glance
- Condition: OEM used OM617.952 3.0L inline-5 turbo-diesel engine assembly, compression tested, oil condition assessed, external components documented per unit
- Availability: In stock for Mercedes W123 300D OM617 applications (donor tagged 1981 per the source data)
- Shipping: Free shipping to all 50 states, 5 to 10 business days
- Application: Mercedes 300D, OM617.952 3.0L inline-5 turbo-diesel (donor tagged 1981 per the source data) – Mercedes’s iconic W123 diesel sedan / wagon
- OM617.952: Mercedes’s iconic OM617 inline-5 diesel engine variant – the .952 specifies the turbo-diesel variant
- Chassis note per source: The OM617 turbo-diesel powered the W123 300D and related models – confirm exact year and chassis by VIN
- Diesel note per source: Classic mechanical diesel: diesel fuel, glow plugs, diesel-rated oil, no modern aftertreatment
- Classic 44-year-old vehicle disclosure applies
- No modern ECU per the source data: There is no ECU to program
- Related diesel listings: See our Hyundai Tucson Engine (1.6L CRDi D4FE), Land Rover Discovery Engine (2.0L Ingenium diesel), Land Rover Defender Engine (AJ20D6 3.0L I6 diesel MHEV), and Range Rover Evoque Engine (D180 2.0L Ingenium diesel) listings for related modern diesel context
- 15 day replacement warranty on component defects
Description
About the Mercedes 300D Engine (OM617.952 3.0L Inline-5 Turbo Diesel, W123 Chassis)
Need a replacement Mercedes 300D OM617.952 3.0L inline-5 turbo-diesel engine? Part Nests sources OEM used OM617.952 3.0L inline-5 turbo-diesel engine assemblies for Mercedes W123 300D applications (donor tagged 1981 per the source data). The Mercedes 300D (W123) is Mercedes’s iconic mid-size diesel sedan / wagon from the classic W123 platform era – widely regarded as one of the most durable and reliable diesel vehicles ever produced with legendary long-service-life reputation across the automotive enthusiast and diesel community. Mercedes’s iconic OM617 inline-5 diesel engine variant – the .952 specifies the turbo-diesel variant. Critical chassis note per the source data – the OM617 turbo-diesel powered the W123 300D and related models. Confirm exact year and chassis by VIN. Classic mechanical diesel – diesel fuel, glow plugs, diesel-rated oil, no modern aftertreatment. No modern ECU – there is no ECU to program. Classic vehicle disclosure applies. Related to broader diesel listings across the modern Hyundai Tucson CRDi, JLR Ingenium 2.0L, JLR AJ20D6 3.0L I6, and Evoque D180 lineup. Each engine is compression tested with oil condition assessed. Call (855) 634-4447 to verify 300D year (W123 era ~1975-1985), chassis / body configuration (sedan vs wagon), and OM617.952 specific variant before ordering.
What Is Included and Not Included
| Detail | Description |
|---|---|
| INCLUDED | The OM617.952 3.0L inline-5 turbo-diesel engine assembly as photographed; confirm the exact configuration at order. |
| NOT INCLUDED | Transmission, accessories not pictured, and fluids; transfer your undamaged accessories at install. |
| Tools You Need | Standard engine-swap tools, diesel-rated oil and a new filter, clean diesel fuel, and basic mechanical-diesel know-how; there is no ECU to program. |
Mercedes W123 300D Vehicle Context (Classic Diesel Legend)
- Mercedes’s iconic W123 diesel: The Mercedes 300D (W123) is Mercedes’s iconic mid-size diesel sedan / wagon from the classic W123 platform era. Widely regarded as one of the most durable and reliable diesel vehicles ever produced with legendary long-service-life reputation across the automotive enthusiast and diesel community. Various examples of high-mileage W123 300D applications with mileage well beyond 500,000 miles are widely documented across the enthusiast community – the W123 300D is widely considered one of the definitive examples of long-lasting durable engineering
- W123 platform era (1975-1985): W123 chassis Mercedes production era approximately 1975-1985 (various market production years may vary slightly). Various W123 body configurations across the production run including W123 sedan (S-body 4-door), S123 wagon (T-model wagon), C123 coupe (2-door coupe), and various W123 special-purpose applications. The 1981 donor era per the source data falls within the W123 platform production run
- 300D nameplate context: The 300D nameplate specifically identifies the 3.0L displacement diesel variant within the W123 platform range. Various W123 diesel variants across the production run including 240D (2.4L OM616 naturally aspirated 4-cylinder), 300D (3.0L OM617 naturally aspirated 5-cylinder, earlier variants), 300D Turbodiesel (3.0L OM617 turbo-diesel 5-cylinder – this application’s OM617.952 turbo-diesel variant), 300CD Turbodiesel (coupe body configuration), 300TD Turbodiesel (wagon body configuration), and various other W123 diesel variants
- W123 300D enthusiast community: The W123 300D has strong global enthusiast community following. Widely regarded across the automotive enthusiast, diesel community, alternative-fuel enthusiast community (various W123 300D applications have been converted to biodiesel / waste vegetable oil operation), and classic vehicle community. Represents one of the definitive classic diesel vehicle applications with lasting cultural impact
Mercedes OM617 Inline-5 Diesel Engine Context
- OM617 engine architecture: Mercedes’s OM617 is Mercedes’s iconic 3.0L inline-5 diesel engine variant. Inline-5 configuration is a relatively unusual engine architecture with distinctive characteristics – the OM617 is widely regarded as one of the definitive successful inline-5 engine applications across automotive engineering history. Standard Mercedes classic mechanical indirect-injection diesel engine architecture
- OM617.952 turbo-diesel specific variant: Per the source data, the .952 specifies the turbo-diesel variant. Various OM617 variants across production including OM617.910 (5-cylinder naturally aspirated diesel), OM617.912 (naturally aspirated diesel), OM617.950 (turbo-diesel earlier variant), OM617.951 (turbo-diesel later variant), OM617.952 (turbo-diesel variant, this application), and various other OM617 variants. Different OM617 variants have different specific configurations – verify OM617.952 specific variant match when ordering
- Classic mechanical diesel architecture: Per the source data, classic mechanical diesel: diesel fuel, glow plugs, diesel-rated oil, no modern aftertreatment. The OM617 uses classic mechanical injection pump (Bosch mechanical injection pump) with no modern electronic engine control. No modern ECU – there is no ECU to program. No DPF (Diesel Particulate Filter), no SCR (Selective Catalytic Reduction), no AdBlue, no modern aftertreatment technology. Different from all modern diesel engines (like our related JLR Ingenium 2.0L diesel, JLR AJ20D6 3.0L I6 diesel, or Hyundai CRDi D4FE listings) that use various modern electronic control and aftertreatment
- Classic diesel service considerations: Classic mechanical diesel service is significantly different from modern electronic-controlled diesel service in various respects. Glow plugs for cold starting (not electronic ignition). Bosch mechanical injection pump timing and calibration. Diesel-rated oil (classic diesel oil specifications, not modern CJ / CK / CJ-4 / CK-4 low-ash formulations required for modern DPF-equipped diesels). No modern aftertreatment service. Various classic diesel service considerations require classic-diesel-specific expertise
Related Diesel / Related Classic Listings
- Hyundai Tucson Engine: Related modern non-US market diesel (1.6L CRDi D4FE) – see our Hyundai Tucson engine listing
- Land Rover Discovery Engine: Related modern JLR diesel (2.0L Ingenium turbo-diesel) – see our Land Rover Discovery engine listing
- Land Rover Defender Engine: Related modern JLR Ingenium inline-six diesel (AJ20D6 3.0L I6 MHEV) – see our Land Rover Defender engine listing
- Range Rover Evoque Engine: Related modern JLR diesel (D180 2.0L Ingenium diesel) – see our Range Rover Evoque engine listing
- Dodge Ram Transmission: Related heavy-duty diesel context (AS68RC + 6.7L Cummins pairing) – see our Dodge Ram transmission listing
- Dodge Stealth Engine: Related classic vehicle context (Mitsubishi 6G72 3.0L V6, DSM 3000GT era) – see our Dodge Stealth engine listing
Engine Specifications
- Type: OEM used OM617.952 3.0L inline-5 turbo-diesel engine assembly for Mercedes W123 300D (donor tagged 1981)
- Function: Classic mechanical turbo-diesel inline-5 engine provides motive power for Mercedes W123 300D applications. Classic Mercedes mechanical indirect-injection turbo-diesel engine architecture
- Construction: The OM617.952 3.0L inline-5 turbo-diesel engine assembly as photographed per the source data. Confirm the exact configuration at order
- What is not included: Transmission, accessories not pictured, and fluids per the source data. Transfer your undamaged accessories at install. Standard practice for used engine replacement scope
- Tools required: Standard engine-swap tools per the source data. Diesel-rated oil and a new filter. Clean diesel fuel. Basic mechanical-diesel know-how. There is no ECU to program
- Classic vehicle disclosure: Classic vehicle engine components commonly show cosmetic wear consistent with approximately 44-year old classic vehicle used part disclosure
- Common failure modes: Compression loss (relatively rare on OM617 – notoriously durable engine), injection pump timing / calibration considerations, glow plug wear, turbocharger service considerations, various age-related component wear on classic vehicle applications. Symptoms include starting difficulty (glow plug issues), smoke, various classic diesel service considerations
- Testing: Compression tested, oil condition assessed, external components documented per unit before shipment
Vehicle Compatibility
| Detail | Description |
|---|---|
| Mercedes 300D, OM617.952 3.0L inline-5 turbo-diesel (donor tagged 1981) | VIN confirmed at order |
| Chassis note | The OM617 turbo-diesel powered the W123 300D and related models; confirm exact year and chassis by VIN |
| Diesel note | Classic mechanical diesel: diesel fuel, glow plugs, diesel-rated oil, no modern aftertreatment |
| Reference Application | 1981 Mercedes 300D Engine (W123, year to be confirmed) |
Why Buy From Part Nests
- OEM verified OM617.952 3.0L inline-5 turbo-diesel engine for Mercedes W123 300D (donor tagged 1981)
- Compression tested, oil condition assessed, external components documented per unit
- Support for W123 platform (1975-1985) verification
- Support for OM617.952 turbo-diesel specific variant (vs OM617.910 / .912 / .950 / .951 variants)
- Classic diesel expertise for one of the most iconic diesel engines ever produced
- Free shipping to all 50 states
- 15 day replacement warranty on component defects
- Support team familiar with W123 300D classic diesel legend heritage and OM617 architecture
- Call (855) 634-4447 to confirm your 300D year, W123 chassis / body configuration, and OM617.952 variant before ordering.
15 Day Replacement Warranty
Every used Mercedes 300D Engine carries a 15 day replacement warranty starting on the delivery date. OM617.952 turbo-diesel variant verification and W123 chassis / body configuration confirmation are critical before ordering. Classic vehicle disclosure applies. Diesel-rated oil and glow plug service required. Call (855) 634-4447 to start a warranty claim within 15 days of delivery.
What Is Covered
- Component defects present on arrival beyond what was disclosed
- Compression, oil, or major internal failures within 15 days from installation
- Engine assembly failures not disclosed at sale
- Incorrect part shipped due to an error on our end
What Is Not Covered
- Damage caused during installation
- Cosmetic wear consistent with 44-year old classic vehicle used part disclosure
- Damage from injection pump timing errors or improper diesel fuel
- Labor expenses of any kind, including classic diesel engine swap labor
- Part: OEM used OM617.952 3.0L inline-5 turbo-diesel engine assembly
- Application: Mercedes 300D, W123 chassis (donor tagged 1981)
- Segment: Mercedes iconic classic diesel sedan / wagon (W123)
- Engine Family: Mercedes OM617 (iconic inline-5 diesel)
- Specific Variant: OM617.952 (turbo-diesel variant - NOT NA .910 / .912)
- Chassis: W123 sedan, S123 wagon, C123 coupe body configurations
- Injection: Classic mechanical Bosch injection pump (no ECU)
- Aftertreatment: None (classic mechanical diesel, no DPF / SCR / AdBlue)
- W123 Era: Approximately 1975-1985 platform production
Additional information
| Brand | Mercedes-Benz |
|---|---|
| Block / Head | Cast iron |
| Configuration | Inline-5 (I5), longitudinal mount |
| Displacement | 2, 998 cc (3.0L) |
| Fuel Injection | Bosch mechanical indirect injection, precombustion chamber |
| Turbocharger | Garrett T3 |
| Engine Management | Mechanical, no ECU |
| Application | 1981 Mercedes 300D Engine (W123, year to be confirmed by VIN) |
| SKU | vaz735 |
| Price | $2, 165.00 |
An OEM used OM617.952 3.0L inline-5 turbo-diesel engine assembly for Mercedes W123 300D applications (donor tagged 1981 per the source data). The OM617.952 3.0L inline-5 turbo-diesel engine assembly as photographed. Function is providing motive power for Mercedes W123 300D applications. Classic Mercedes mechanical indirect-injection turbo-diesel engine architecture.
Mercedes's iconic mid-size diesel sedan / wagon from the classic W123 platform era. Widely regarded as one of the most durable and reliable diesel vehicles ever produced with legendary long-service-life reputation across the automotive enthusiast and diesel community. Various examples of high-mileage W123 300D applications with mileage well beyond 500,000 miles are widely documented. W123 platform era approximately 1975-1985.
Mercedes's iconic 3.0L inline-5 diesel engine variant. Inline-5 configuration is a relatively unusual engine architecture with distinctive characteristics - the OM617 is widely regarded as one of the definitive successful inline-5 engine applications across automotive engineering history. Standard Mercedes classic mechanical indirect-injection diesel engine architecture.
Per the source data, the .952 specifies the turbo-diesel variant. Various OM617 variants across production including OM617.910 (5-cylinder naturally aspirated diesel), OM617.912 (naturally aspirated diesel), OM617.950 (turbo-diesel earlier variant), OM617.951 (turbo-diesel later variant), OM617.952 (turbo-diesel variant, this application). Different variants have different specific configurations.
No. Per the source data diesel note, classic mechanical diesel: diesel fuel, glow plugs, diesel-rated oil, no modern aftertreatment. There is no ECU to program per the source data tools note. The OM617 uses classic mechanical Bosch injection pump with no modern electronic engine control. Different from all modern diesel engines that use various modern electronic control.
None. Per the source data, no modern aftertreatment. The OM617 has no DPF (Diesel Particulate Filter), no SCR (Selective Catalytic Reduction), no AdBlue, no modern aftertreatment technology. Different from all modern diesel engines (like our related JLR Ingenium 2.0L diesel, JLR AJ20D6 3.0L I6 diesel, or Hyundai CRDi D4FE listings) that use various modern aftertreatment.
Diesel-rated oil per the source data. Classic diesel oil specifications (not modern CJ / CK / CJ-4 / CK-4 low-ash formulations required for modern DPF-equipped diesels). Classic diesel service considerations require classic-diesel-specific oil specifications appropriate for the OM617 architecture. Use of appropriate diesel oil is critical for long-term engine reliability.
The OM617 powered the W123 300D and related models per the source data chassis note. Various W123 body configurations across the production run including W123 sedan (S-body 4-door), S123 wagon (T-model wagon), C123 coupe (2-door coupe). Various W123 diesel variants including 300D Turbodiesel (this application), 300CD Turbodiesel (coupe), 300TD Turbodiesel (wagon).
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