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Old 08-09-2008, 10:35 PM
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Join Date: Jun 2006
Location: Harlingen, TX
Posts: 13
Parts number explanation


Could someone with some knowledge of MB part numbers please help me with the following:

I need a replacement climate control unit for an '87 300TDT. My part number is 1248301885. I've found a replacement unit pulled from an '88 300E with the part number 1248303085. The units appear to be the same, with only the middle two digits of the part number being different. (those two digits are heat stamped, while the rest of the part number is ink printed) Can someone please help me determine, based on the part number, if I can use this unit in my car?
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Old 08-09-2008, 11:25 PM
Join Date: Jul 2003
Location: Alberta
Posts: 266
Here's an excerpt from a detailed description of the Mercedes part number system...
Originally Posted by

Example 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.
So, in your case, comparing part numbers 124 830 18 85 and 124 830 30 85, they appear to be the same part, and just different versions. While this doesn't guarantee they are the same, it indicates that they probably aren't wildly different.

I have no experience with the exact parts you are looking at, but in my (limited) experience with other parts, I've never had a compatibility issue when swapping parts where only the version differed. Often when I get new parts from the mercedes dealership, the new parts have a higher version than the original part I am replacing (and they have always been compatible).

Edit: According to the EPC, the 18 part was used in the 124.193 (300D) and 124.133 (300DT). The 30 part was used in the 124.050 (300CE), 124.026 (300E-2.6), 124.030 (300E) and 124.090 (300TE). The parts may be similar, but the EPC doesn't explicitly show the 30 part as being a direct replacement for the 18.

1989 250TD Wagon 5-speed, 160,000mi ::: Dark gray metallic / black cloth
1984 190D-2.2 5-speed, 287,000mi ::: Silver-blue metallic / black MB-tex ::: SOLD

Last edited by cornblatt; 08-09-2008 at 11:51 PM.
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Old 08-09-2008, 11:55 PM
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Join Date: Jun 2006
Location: Harlingen, TX
Posts: 13
Thank you, that does clear things up quite a bit.
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