Many parts — particularly hardware such as nuts, bolts, and washers — are used in multiple applications across different chassis (for example, the W124 and the W210), across different models (for example, the 500E and the 400E), and even across different applications or systems on the same car (for example, the power steering and SLS systems).
To find the different chassis, models and systems where any given part is used, it's important to use the ISPPI/XPISS system, or the EPC, to find these applications.
Here is how it is done. In this example, we are using the part number 119 970 00 45 as an example.
ISPPI / XPISS INSTRUCTIONS:
Log into your ISPPI account.
Then, enter the part number into the "Part Number" search box on the right-hand side of the main screen, as seen below. There is no need to enter any vehicle-specific or VIN information into the ISPPI.

After entering the part number, hit the [ENTER] key. The following screen will pop up, for the part number 119 997 00 45. It shows a list of uses for this part.

Select the specific application for the part that is desired. In this case, it is the "119" number in the left-hand column, as you concerned about the M119 engine for this particular parts query.
After selecting "119," the following screen will pop up, showing all of the applications on various versions of the M119 engine. You want to select the "119.974" number, for the E500E variant of the engine (or whatever engine you are concerned with). You also want to look at the specific system you are concerned with (power steering pump, tandem pump, etc.).

It will then show the parts diagram and part-number description for the application you are looking for.

EPC INSTRUCTIONS:
Start up and log into your EPC system.
Then, select the "Search" menu at the top of the screen, as shown below. There is no need to enter any vehicle-specific or VIN information into the EPC. From there, make sure you are on the "Part without vehicle data" tab of the search window that pops up. It should be pre-populated with an "A" in the search box when you select this tab.

Enter the part number, with no spaces, directly after the "A" in the search box, as shown below.

Click the [ENTER] key to commence the search. A list of various applications for the part number across various engines and chassis will show up, as below.

Select the desired application (in this case, the 119 Model/SA, with the "North America" market row in the left-hand column). Hit the [ENTER] key again.
Upon doing this, you will see a list of applications of this part number on the selected engine/chassis. This list will show the systems where this part number is used. Select the desired system, as shown in the list below.

After clicking [ENTER] again, to select the desired application, you will be shown an exploded parts diagram and part number information for what you are looking for, as below.

At this point, you are done with your search.
As you can see, either of these methods are MUCH more precise than any RevolutionParts on-line catalog -- which in the case you cited above, actually shows a physically different part in its diagram than the part is in reality. This inaccuracy contributes to confusion, and reinforces perfectly why the RevolutionParts catalogs should be 100% ignored, and that the RevParts dealer websites should only be used as front-ends for ordering discounted Mercedes-Benz parts.
To find the different chassis, models and systems where any given part is used, it's important to use the ISPPI/XPISS system, or the EPC, to find these applications.
Here is how it is done. In this example, we are using the part number 119 970 00 45 as an example.
ISPPI / XPISS INSTRUCTIONS:
Log into your ISPPI account.
Then, enter the part number into the "Part Number" search box on the right-hand side of the main screen, as seen below. There is no need to enter any vehicle-specific or VIN information into the ISPPI.

After entering the part number, hit the [ENTER] key. The following screen will pop up, for the part number 119 997 00 45. It shows a list of uses for this part.

Select the specific application for the part that is desired. In this case, it is the "119" number in the left-hand column, as you concerned about the M119 engine for this particular parts query.
After selecting "119," the following screen will pop up, showing all of the applications on various versions of the M119 engine. You want to select the "119.974" number, for the E500E variant of the engine (or whatever engine you are concerned with). You also want to look at the specific system you are concerned with (power steering pump, tandem pump, etc.).

It will then show the parts diagram and part-number description for the application you are looking for.

EPC INSTRUCTIONS:
Start up and log into your EPC system.
Then, select the "Search" menu at the top of the screen, as shown below. There is no need to enter any vehicle-specific or VIN information into the EPC. From there, make sure you are on the "Part without vehicle data" tab of the search window that pops up. It should be pre-populated with an "A" in the search box when you select this tab.

Enter the part number, with no spaces, directly after the "A" in the search box, as shown below.

Click the [ENTER] key to commence the search. A list of various applications for the part number across various engines and chassis will show up, as below.

Select the desired application (in this case, the 119 Model/SA, with the "North America" market row in the left-hand column). Hit the [ENTER] key again.
Upon doing this, you will see a list of applications of this part number on the selected engine/chassis. This list will show the systems where this part number is used. Select the desired system, as shown in the list below.

After clicking [ENTER] again, to select the desired application, you will be shown an exploded parts diagram and part number information for what you are looking for, as below.

At this point, you are done with your search.
As you can see, either of these methods are MUCH more precise than any RevolutionParts on-line catalog -- which in the case you cited above, actually shows a physically different part in its diagram than the part is in reality. This inaccuracy contributes to confusion, and reinforces perfectly why the RevolutionParts catalogs should be 100% ignored, and that the RevParts dealer websites should only be used as front-ends for ordering discounted Mercedes-Benz parts.
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