I have been told by a reputable repair shop that the throttle body harness for the 104 engine is no longer made. I haveAs Steve mentioned, above, there are a few things to consider with a head gasket replacement, and he outlined them pretty well. One additional consideration, although not really related to a head gasket or head gasket failure, is the condition of the wiring or electrical harness on the engine. The harness has been a source of trouble due to its being made of a biodegradable material. Unfortunately the relative of the Mercedes engineer who approved using these harnesses mis-led the engineer as to how long they would last. My point is that if the harness has never been changed, a shop may be reluctant to do the head gasket job because if the wiring harness fails while in their care, the car may be unusable without the harness being replaced. An estimate for replacing the harness (including the cost of a harness) is around $1200.
Yes, I just had a reputable repair shop tell me that the throttle body harness for the 104 engine is no longer made.Pilot,
What are your symptoms?
If I recall earlier you were asking for help a few weeks ago. Is this the same car? How are the engine harness and throttle body?
If you are mechanically inclined the harness should run 2-400 used on ebay, and a two hours of time to do yourself. But yes, harness new is a car value doubling $1200 ( new) for the part.
Do you know the name of companies that are rewiring the harness?Taking the statements your mechanic has made, at face value, then I would say your mechanic's knowlege of these cars is not as deep as you need it to be. Most any of us on this site are not professional mechanics and we are well aware that there were replacement harnesses made that many cars had installed. These replacement harnesses will most likely last the life of the car rather than 15 years for the original ones. On the other hand, if your mechanic was trying to "scare you off" on the harness replacement, maybe there is more to the story.
Additionally, there are many things that are no longer available but a resourceful person will find a solution. The Throttle Bodies are currently being rewired by a few different sources so there are people who do this regularly and who know these throttle bodies well. A mechanic who is not aware of these services is not very helpful at best, and downright useless at worst.
But can I use it on a 1994 E320? I understand that each throttle body harness has a tag on it, and the new wiring harness needs to meet the specifications on the tag.mercedes never sold the throttle body harness by itself, they sold new and/or remanufactured throttle bodies that came with a new harness. used throttle bodies with 1998+ date codes are 100% acceptible, and readily available.
throttle body gasket for HFM E320's is part A1041410780 and are available from several vendors, Mercedes Throttle Body Mounting Gasket - Elring 1041410780
that PN I gave was for the GASKET not the harness. As I said, the throttle body harness was never separately sold, its part of the throttle body assembly.But can I use it on a 1994 E320? I understand that each throttle body harness has a tag on it, and the new wiring harness needs to meet the specifications on the tag.
Yes, it helps a lot. I have been experiencing a surge on the gas pedal when I push it to get around a slow car inJust to make sure the understanding is clear. When Delphi began making replacement harnesses, they all were a solution for the early degrading biodegradable harnesses. many owners had these installed in their cars. Many others are seeking these harnesses out of junkyards because they are a totally viable solution for the failed biodegraded harness in their car that had never been replaced.
There is a date after which the Throttle Bodies were produced with perfectly good harnesses as well. What you need someone to do is read the date on the Throttle Body and check your main harness for a Delphi tag.
There are companies that will replace the biodegradable Throttle Body harness and there are mulitple sources (eBay, forum members, etc,) for the Delphi harnesses.
Does this help?
Thanks a lot for the information. I will talk to my mechanic about the valve cover gasket. I thought he just changedThe oil smell is very likely coming from the valve duct seals or the valve cover gasket. Just get a complete valve cover kit with valve duct seals from your local MB dealer.
As for the throttle body, just get a 2nd hand complete throttle body made in 1998 later. These are available all day long on fleaBay. Make sure you get a new gasket for the throttle body from the dealer as well to avoid vacuum leaks.
FYI, I've never seen the rewired throttle bodies go the long haul hence my preference for a good used unit as long as it was manufactured 1998 and beyond.
Be happy you're not driving a V12 powered W140. Same wiring issues, and same throttle body problems except on that motor you need 2 throttle bodies and each throttle body is new from the dealer for a mere $8K+ PER unit.