Sleeper Renntech SL74 for sale

After 3 of these monster R129 Mercedes showed up this past summer, we got a tip for another one on eBay from Portland, Oregon. It’s a short list of cars that have over 7 liters of displacement, and pretty extreme for Renntech to punch out the normal 6.0 liter V12 in the SL an extra 1.4 liters. A couple things always seem come up with these cars: time/space-bending power in a dated chassis, and massive depreciation. I’ve always fantasized about having a Benz that could light up the rears on the highway, so maybe this is the most financially feasible way to achieve that goal.

The seller’s 2 cents:

This is an extremely rare Mercedes SL600. It was converted to a RENNtech in 1999, and has a 7.4 liter 575 HP engine with camshafts and ported and polished heads. It also carries a RENNtech resonator by pass, RENNtech rear muffler, oil cooler, CF air intake, transmission upgrade, ASR delete switch, larger front and rear sway bar, Alcon 14″ front brakes and AMG 18 inch Aero wheels all verified through RENNtech. The Customer spent $73,681.00 to do this RENNtech conversion. The car is in spectacular shape, with books and all four Keys.

In the same sleeper green as the one Evan found this summer, this one is extra sleepy with standard AMG monoblocks and completely shaved identifying badges. Nice to see another one that’s been driven, having covered 89k miles, but the flipside is that you’ve got a 90k-mile tuner V12. Right. Anyways, while it’s certainly not the best looking R129, that’s kind of the appeal here: scary power in as plain-jane an exterior as Mercedes can do. No bites at $20k yet, we’ll see if even that is too high for a car whose monster in the engine bay is only matched by its monster depreciation.

-NR

Another Mercedes Renntech SL74, really?

We have seen three of these Renntech SL74 beasts show up for sale this summer, which is pretty unbelievable. Our previous finds:
https://germancarsforsaleblog.com/1997-mercedes-sl74-renntech-monster

https://germancarsforsaleblog.com/1994-mercedes-benz-sl74-renntech

Sometimes an owner will see another seller claiming to have a really rare car and take the opportunity to show of his own to show the other guy he isn’t the only one. Sometimes following up one rare listing with another lets a seller piggy back on some of the excitement or the initial sale or lets them judge interest or gauge market value. Perhaps that’s the case with this third SL74.
This one is a 1996 in white found by reader Nik. It is a bit more showy than the other two we saw this year. Chromed intakes, vented hood, embroidered logo headrests, big sound system in the trunk, etc. The specs are right inline with the other two we’ve seen. The seller quotes an investment of over $200,000 and lists the upgrades as follows:

Specs:

V12 engine producing 595 BHP, 605 lbs-ft @4000 RPM. 0-60 is second 3.9 seconds and a top speed of 200 MPH 1/4 times of 11.9

Modifications:

Renntech 7.4 liter engine conversion (stage 4) $49,500:

high performance engine rebuilt, performance intake and exhaust camshafts, ported/polished cylinder heads, larger f1 valves, stainless steal resonator bypass, stainless renntech sports rear muffler.

Renntech top speed removal $1,500

First gear start transmission valve body $1,350

Renntech transmission upgrade with limited slip $7,790

Downpipes all metal catalyzers $7,000

Renntech 14″ brakes $5,760

Renntech oil cooler kit $1,250

New convertible top and brand new wheels and brand new tires.

front 245/35/19

rear 275/30/19

Pioneer DVR

Full AMG BODY Kit includes: side skirts, front bumper, rear bumper and rear spoiler. Also comes with rear seats.

includes: hard top cover

Please check out this link. http://www.renntechmercedes.com/article_files/cnd0898.pdf

With a day left this one is up to just under $17,000 reserve not met. The Buy-It-Now price is $28,900. As with the others I’ll say this again, that is a heck of a lot of depreciation. Unlike the others though this one has actually seen substantial use at 91,000 miles. That’s nice to see.

~Evan

1994 Mercedes Benz SL74 Renntech

Today hearing of a Mercedes pushing 500 horsepower, while not really yawn factor, is certainly not surprising. AMG has done an amazing job generating massive power and torque numbers for Mercedes that you can now buy of the regular dealer showroom floor. While big engine big power Benzs have been a hallmark of the company for years they were scarcer in years past.

This big fellow could scare off just about everything else on the road when it was new back in 1994. The SL74 was a Renntech package that took the already potent Mercedes 6 liter V-12 and pushed it out to 7.4 liters. With about 600 horsepower and 600 lb. ft. of torque after the conversion all coming out of a lagless normally aspirated engine one could easily spin the z rated tires down to the rims.

It isn’t clear if this car was converted by Renntech just after the purchase or if the conversion took place later in the car’s life. With only 15,000 miles it doesn’t really matter.

This car has similar specs to the Renntech SL74 I posted early this summer:

https://germancarsforsaleblog.com/1997-mercedes-sl74-renntech-monster

Giant brakes (seriously look inside the wheels at those things), exhaust, limited slip diff, upgraded transmission all are necessary additions. The sort of things you would associate with a handbuilt rocketship. What sets this one apart, ironically, is at first glance it is so subdued. You could easily mistake this for just another R129 series Benz. The wheels are nothing too exciting, though closer inspection reveals them to be light magnesium wheels. Nothing seems too fancy about the bodykit, some flares and vents, not even a badge on the back, then you realize it is all carbon fiber, hood, fenders, rockers. This saves, according to the seller 600 lbs in weight.

A peak inside and you can see that this SL is not for prowling a Florida retirement community, though grandpa would probably like the feel of those Recaro ortho sport seats, grandma likely would not want to fumble with the four point race harness.

I believe you can still get this conversion done by Renntech if you have the cash. The original cost was $325,000, that included $110,000 for the stock SL600.  Take the depreciation and buy this two owner sneak attack machine for $65,000. Geniuses drive green cars after all right? Hard top and stand included. Just be careful the seller has no feedback.

It is worth noting that the Renntech 7.4 should not be confused with the similar era Mercedes AMG SL73, which was a factory produced vehicle available in very limited numbers. The 7.3 liter AMG engine is the engine that went on to more recent fame as the power plant for the Pagani Zonda producing similar power figures as this Renntech.

~Evan

1997 Mercedes SL74 Renntech Monster 17k miles

While Mercedes and its associated high end tuners went through a stage recently of getting huge horsepower numbers from supercharged and turbo cars, there is something to be said for pure normally aspirated big block power. This Renntech modified SL74 epitomizes that philosophy. The stock 6.0 liter 48 valve V-12 engine has been bumped out to 452 cubic inches and is generating 575 horsepower and 600 lb. ft. of torque. The power is mated to a five speed automatic that has been beefed up to handle the power. Worked over intake, uprated suspension and cooling systems, 14″ Alcon brakes, 18” OZ Racing wheels( 18” x 11.5” out back), and AMG bodyparts. Plus you get all the luxury interior components you would expect from a top of the line Benz of that era. The seller says he whole package cost $90,000 from Renntech when it was new.
All that huge no lag power must be an real blast. The car is hardly broken in with only 17,000 miles. The car looks like it came from Canada since I see Manitoba plates in one of the photos. For $79,000 you can go pick this car up in Dallas Texas and have a fun comfortable ride home anywhere in the country.
Lots more pictures and description from the seller are on his site.

1997 Mercedes SL74 for sale on private site

Also on Dallas Craigslist

~Evan