part number descriptions
#7
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Join Date: Jun 2003
Location: Aridzona
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'15 S550, '10 E350 P1/P2, '02 ML320
Sooo, the Benz p/n system is not google friendly for the most part because of the inherent spaces between the chassis, group, subgroup, id. So I usually just remove the "A" and the spaces and find what I need.
First hit on my google search for the part number in your post.
https://www.ebay.com/p/Rear-Exhaust-...63-AMG-02-11-A]2184900101/10020226890
First hit on my google search for the part number in your post.
https://www.ebay.com/p/Rear-Exhaust-...63-AMG-02-11-A]2184900101/10020226890
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#8
Member
Thread Starter
Sooo, the Benz p/n system is not google friendly for the most part because of the inherent spaces between the chassis, group, subgroup, id. So I usually just remove the "A" and the spaces and find what I need.
First hit on my google search for the part number in your post.
https://www.ebay.com/p/Rear-Exhaust-...63-AMG-02-11-A]2184900101/10020226890
First hit on my google search for the part number in your post.
https://www.ebay.com/p/Rear-Exhaust-...63-AMG-02-11-A]2184900101/10020226890
#9
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Join Date: Jun 2003
Location: Aridzona
Posts: 629
Received 81 Likes
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71 Posts
'15 S550, '10 E350 P1/P2, '02 ML320
Thank you that will help but what I was specifically looking for was; first letter means ?, next three numbers means (I think it is the chassis}, next two and so on. Maybe there is no coding sequence and it's random but knowing the Germans, I doubt it. Again thanks for the help.
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happyeds (03-26-2019)
#10
Super Member
here ya go:
The Mercedes-Benz "Group" system
The original factory identification system was inherited from car and truck production, it dates back to sometime right after W.W.I. The first system was all "alpha" based and parts books were organized in the following order:
MMotor (Motor)
KuKupplung (Clutch)
GGetriebe (Transmission/gear box)
VVordachse (Front axle)
HHinterachse (Rear Axle)
RRahmen (Frame)
FFederung (Springs)
StStussdämpfer (Travel dampener, shock absorber)
BBremsen (Brakes)
LLenkung (Steering)
KKühle (Cooling)
KrAKraftstoffanlage (Fuel system)
EElektrische Ausrüstung (Electric system)
DDruckluftanlage (Pneumatic item, trailer brakes, lift cylinder, air powered rear 3 point hitch)
ZZapfwellen (PTO’s)
AAufbau (Cab, body)
PPritsche (Rear platform)
You’ll find this format followed in all the early service manuals, etc.. In the late 40’s they realized that an all numeric system would be better for the parts identification system, however, it took them awhile to finalize the system. The motors were numbered:
1Engine, non moving parts
3Engine moving parts
5Engine timing
7Injection system
9Fuel and air filters, etc.
13Air compressor
15Engine electrical system
18Engine lubrication
20Engine cooling system
22Motor mounts
This system has basically remained in place right through current production.
Unfortunately, they first decided that each system, motor, chassis and cab, would have it’s own number sequence. Thus chassis were first numbered:
1Front axle
2Rear axle
3Frame
4Wheels/tires
5Springs, shocks, dampener
8Steering
12Brakes
13Transmission/PTO’s
15PTO shafts
18Bumper
21Trailer hitch, fixed drawbar
223 point hitch
31Fuel system
40Radiator
62Battery box, wiring harnesses, etc.
In the early 60’s it seemed to the parts guys that this was cumbersome as you could have a spare part with a group 3 number, but without looking at it, you could not tell if it was an engine part or a chassis part. At the same time MB was adopting key punch based computing systems and they needed to standardize their part numbering sequence. Thus was born the system used today, where the group number immediately identifies where on a vehicle the part goes. The part number identifies the group a part belongs to. The modern group system is formatted:
Groups 01 to 23 are engine related
Groups 24 to 58 are the chassis including the platform
Groups 60 to 92 are cab related
The MB number system then tells you where something goes, and whether or not it is a proprietary item or a trade item. The current front brake caliper, that would fit the disc brake U900, U1100, U1200, U1400, etc. in the forward, right hand, front axle position is now part number:
A 427 421 20 98
This can be broken down as follows: the "A" indicates it is a regular Mercedes-Benz part. The 427 is the model this part was first used on and also indicates it is a proprietary part. The "421" indicates it is part of the brake system, and further more is a hydraulic component rather than pneumatic which would use a "43x" in this position. "20" indicates this is the twentieth version of this part, the "98" is the "part number" in the master listing. The ninety eighth part.
To really keep the parts guys confused, the inventory system is organized to read this part number and stock it using the following sequence numerically. Digit order:
four, five, six, nine, ten, one, two, three, seven, eight.
This system is why computer programmers, HATE MB’s parts system. It takes some special software to teach a computer to count out of sequence. Even though this caliper is built by ATE (Alfred Teves) it is proprietary to MB. If it was an adapted off the shelf item, available through the after market, the part number would start with zero such as A 002 421 xx xx. The zero in position one, one & two, or one , two and three, indicates the part is a common trade part.
A similar system is followed with part numbers for DIN (Deutsche Industrial Normal) hardware items. These items are all in a 12 digit part number form and are preceded by the letter "N":
N 000960 020078
This follows a similar concept. The "N" indicates it is "normal" hardware. The "000" means it’s a standard item, the "960" means that it conforms to DIN standard 960, which is a hex head, cap screw, with partial threaded shank, the "020" is the diameter 20.0 mm, and the "078" is MB’s designation meaning this is the seventy eighth 20.0 mm bolt, and specification number 78 will spell out length, thread pitch, hardness etc. In this case it is a steel, grade 10.9 bolt, M20 x 1.5 x 85 long and used on the front shock mount on a 419 Unimog, and late model, disc brake, U900, U1100 models. They follow this system with all of the hardware, clamps, etc. that are trade items. If it is a specialty fastener they will give it a proprietary MB number. A good example would be the differential used in the U900, U110, U1200. The differential case is held to the ring gear with eight bolts. Four of these are a standard DIN fastener and have the part number N 000960 012277, a 12.0 mm bolt conforming to DIN 960. The other four are a special "fitted" bolt, with a special diameter shank, these have a MB Number A 416 990 52 19 since they cannot be purchased from a bolt supplier.
All MB part numbers start with an alpha character. Unimog owners will encounter:
AA regular MB part
CA newer designation for whole MB assemblies
NA DIN hardware item
WA special tool
The Mercedes-Benz "Group" system
The original factory identification system was inherited from car and truck production, it dates back to sometime right after W.W.I. The first system was all "alpha" based and parts books were organized in the following order:
MMotor (Motor)
KuKupplung (Clutch)
GGetriebe (Transmission/gear box)
VVordachse (Front axle)
HHinterachse (Rear Axle)
RRahmen (Frame)
FFederung (Springs)
StStussdämpfer (Travel dampener, shock absorber)
BBremsen (Brakes)
LLenkung (Steering)
KKühle (Cooling)
KrAKraftstoffanlage (Fuel system)
EElektrische Ausrüstung (Electric system)
DDruckluftanlage (Pneumatic item, trailer brakes, lift cylinder, air powered rear 3 point hitch)
ZZapfwellen (PTO’s)
AAufbau (Cab, body)
PPritsche (Rear platform)
You’ll find this format followed in all the early service manuals, etc.. In the late 40’s they realized that an all numeric system would be better for the parts identification system, however, it took them awhile to finalize the system. The motors were numbered:
1Engine, non moving parts
3Engine moving parts
5Engine timing
7Injection system
9Fuel and air filters, etc.
13Air compressor
15Engine electrical system
18Engine lubrication
20Engine cooling system
22Motor mounts
This system has basically remained in place right through current production.
Unfortunately, they first decided that each system, motor, chassis and cab, would have it’s own number sequence. Thus chassis were first numbered:
1Front axle
2Rear axle
3Frame
4Wheels/tires
5Springs, shocks, dampener
8Steering
12Brakes
13Transmission/PTO’s
15PTO shafts
18Bumper
21Trailer hitch, fixed drawbar
223 point hitch
31Fuel system
40Radiator
62Battery box, wiring harnesses, etc.
In the early 60’s it seemed to the parts guys that this was cumbersome as you could have a spare part with a group 3 number, but without looking at it, you could not tell if it was an engine part or a chassis part. At the same time MB was adopting key punch based computing systems and they needed to standardize their part numbering sequence. Thus was born the system used today, where the group number immediately identifies where on a vehicle the part goes. The part number identifies the group a part belongs to. The modern group system is formatted:
Groups 01 to 23 are engine related
Groups 24 to 58 are the chassis including the platform
Groups 60 to 92 are cab related
The MB number system then tells you where something goes, and whether or not it is a proprietary item or a trade item. The current front brake caliper, that would fit the disc brake U900, U1100, U1200, U1400, etc. in the forward, right hand, front axle position is now part number:
A 427 421 20 98
This can be broken down as follows: the "A" indicates it is a regular Mercedes-Benz part. The 427 is the model this part was first used on and also indicates it is a proprietary part. The "421" indicates it is part of the brake system, and further more is a hydraulic component rather than pneumatic which would use a "43x" in this position. "20" indicates this is the twentieth version of this part, the "98" is the "part number" in the master listing. The ninety eighth part.
To really keep the parts guys confused, the inventory system is organized to read this part number and stock it using the following sequence numerically. Digit order:
four, five, six, nine, ten, one, two, three, seven, eight.
This system is why computer programmers, HATE MB’s parts system. It takes some special software to teach a computer to count out of sequence. Even though this caliper is built by ATE (Alfred Teves) it is proprietary to MB. If it was an adapted off the shelf item, available through the after market, the part number would start with zero such as A 002 421 xx xx. The zero in position one, one & two, or one , two and three, indicates the part is a common trade part.
A similar system is followed with part numbers for DIN (Deutsche Industrial Normal) hardware items. These items are all in a 12 digit part number form and are preceded by the letter "N":
N 000960 020078
This follows a similar concept. The "N" indicates it is "normal" hardware. The "000" means it’s a standard item, the "960" means that it conforms to DIN standard 960, which is a hex head, cap screw, with partial threaded shank, the "020" is the diameter 20.0 mm, and the "078" is MB’s designation meaning this is the seventy eighth 20.0 mm bolt, and specification number 78 will spell out length, thread pitch, hardness etc. In this case it is a steel, grade 10.9 bolt, M20 x 1.5 x 85 long and used on the front shock mount on a 419 Unimog, and late model, disc brake, U900, U1100 models. They follow this system with all of the hardware, clamps, etc. that are trade items. If it is a specialty fastener they will give it a proprietary MB number. A good example would be the differential used in the U900, U110, U1200. The differential case is held to the ring gear with eight bolts. Four of these are a standard DIN fastener and have the part number N 000960 012277, a 12.0 mm bolt conforming to DIN 960. The other four are a special "fitted" bolt, with a special diameter shank, these have a MB Number A 416 990 52 19 since they cannot be purchased from a bolt supplier.
All MB part numbers start with an alpha character. Unimog owners will encounter:
AA regular MB part
CA newer designation for whole MB assemblies
NA DIN hardware item
WA special tool
The following 4 users liked this post by nota_amg:
#11
Member
Thread Starter
From the start it is just amazing the detail this company and it's personal have. Without computers, reference numbers and records of everything, it's mind boggling. Again thanks for the info. BTW is this in a type of history book of the Daimler Benz / Mercedes company?
#12
Super Member
I remember learning about it and having charts in the training manuals in ELITE, but this came from a website listed in another thread on this subject here on MBWorld. I would look for it in my manuals, but I just recently had them all recycled, I think...I'll have to check when I get home.
#13
MBWorld Fanatic!
From the start it is just amazing the detail this company and it's personal have. Without computers, reference numbers and records of everything, it's mind boggling. Again thanks for the info. BTW is this in a type of history book of the Daimler Benz / Mercedes company?