Renntech ECU and Airbox Upgrades for the M119 - Mercedes-Benz Forum
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post #1 of 14 (permalink) Old 05-11-2019, 04:58 AM Thread Starter
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Renntech ECU and Airbox Upgrades for the M119

Guys - I've seen numerous E500E modified with the Renntech carbon airbox and ECU upgrade, I can't remember the exact hp gains, but I believe its a nice bump over stock. Has anyone done the same on their SL500 \ 500SL seeing that its the same engine? I looked at Renntech's website this morning and there are no listings for any M119 powered cars.

Thoughts?
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post #2 of 14 (permalink) Old 05-11-2019, 08:48 AM
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You'd have to look on eBay and get lucky or inquire specifically at RENNtech for old stock.
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post #3 of 14 (permalink) Old 05-11-2019, 10:12 AM
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Originally Posted by slownrusty View Post
Guys - I've seen numerous E500E modified with the Renntech carbon airbox and ECU upgrade, I can't remember the exact hp gains, but I believe its a nice bump over stock. Has anyone done the same on their SL500 \ 500SL seeing that its the same engine? I looked at Renntech's website this morning and there are no listings for any M119 powered cars.

Thoughts?
Cheers!

Well, for what it's worth, official gains of M119 running with LH modules (based on W124 .36 cars) numbers were as follows (based on Renntech factory brochure):

091240093 HP 10 Lbs.-Ft. torque 8 total 325 @ 5700 355 @ 3900 Carbon-fiber air cleaner $950
541240091 HP 15 Lbs.-Ft. torque 17 total 330 @ 5700 364 @ 3900 Fuel Management E-PROM $650

Finding these? Well, good luck!

Regards,
D
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post #4 of 14 (permalink) Old 05-11-2019, 10:35 AM Thread Starter
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Thanks D - That's super helpful, you come through as always.
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post #5 of 14 (permalink) Old 05-14-2019, 04:57 AM Thread Starter
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To close the loop I called RennTech yesterday and they do not offer the carbon fiber air boxes anymore but they might be able to install their eprom on the M119 ECU, they are checking into this and will call me back.

I'll advise once I hear back.
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post #6 of 14 (permalink) Old 05-14-2019, 05:04 AM
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Who did you talk to?
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post #7 of 14 (permalink) Old 05-15-2019, 04:47 AM Thread Starter
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Who did you talk to?
I spoke to two individuals (one in marketing and a tech) and the tech was going to check with their ECU programmer, I didn't write down any names. I haven't heard back from RennTech, so I guess I need to call them again.
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post #8 of 14 (permalink) Old 05-15-2019, 09:52 AM
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I see. Let me check as well.
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post #9 of 14 (permalink) Old 05-16-2019, 05:15 AM
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Hi SnR. Checked w them. Both are readily available. The air box of course is done on an as needed basis, none in stock. Presumably you called Renntech in Florida?
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post #10 of 14 (permalink) Old 05-16-2019, 02:48 PM
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I called Renntech in Florida today and they said they did not have any performance products for the R129, and I specifically asked about the airbox and ECU upgrade. Is there a different location to call? I would be interested in the ECU and maybe the airbox for my 1998 SL500. Thanks.
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