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Friday 27th July 2012

PH Heroes: Mercedes 450SEL 6.9

It's got a 6.9-litre V8 engine in it ... how could it be anything other than a hero?



My research for this story started with the mental image of a Mercedes 450SEL 6.9 joining a deserted motorway somewhere, the most outrageous cloud of tyre smoke erupting from its rear wheels in a symbolic evocation of all that is incongruous and wonderful about this monster of a car.

405lb ft is not what you expect of this
405lb ft is not what you expect of this
I had in mind 70s era Car magazine, perhaps even LJK Setright at the wheel. Had I imagined it? I asked Steve Cropley, a Car editor of the period. It rang a bell with him but he couldn't be sure. He suggested I contact Mel Nichols, a former incumbent in the same editorial chair.

Mel wasn't sure either, though again it rang a bell. And prompted an anecdote of his own that, very neatly, summarises why the 6.9 deserves recognition as more than just an old Merc with a sodding great V8.

Blast from the past
"At the old SMMT Test Day at Silverstone in 1975 or 1976, Mercedes brought a LHD 6.9 with Fangio to drive it," recalls Nichols. "LJKS and I jumped in with him. Leonard sat in the front with Juan Manuel, I was in he back right side and someone else I can't remember in the left rear seat.

6.9-litre V8 lurks beneath stately bonnet
6.9-litre V8 lurks beneath stately bonnet
"Fangio took us around the Grand Prix circuit flat out, beautifully smoothly and uneventfully. We didn't appreciate quite how fast we were going until, approaching the old, fearsome, mega-fast Woodcote corner Fangio pulled to the left to overtake a racing Pantera that was being shaken down. It was flat out, on the racing line. Its driver was working away at the wheel as it twitched and hopped around through the corner.

"Fangio, driving with one hand, making just tiny movements at the wheel and talking to Leonard all the while, slipped up alongside the Pantera and eased past him. I looked out the side window and grinned at the Pantera driver as we were alongside, just a couple of feet away. I'll never forget the stunned look on his face as he realised he was being overtaken, in the middle of one of racing's most challenging corners, by a Mercedes saloon with four people on board. It was too much for him. He backed off and just trundled around slowly until we did a couple more laps and pulled off the circuit. I wonder if he ever knew it was Fangio behind the 6.9's wheel."

450SEL underpinnings include LSD
450SEL underpinnings include LSD
Brain and brawn
Hints of what made the 6.9 capable of stuff like this can be found lurking in the technical specification, which makes fascinating reading for anyone bothered enough to go beyond that intimidating displacement figure.

That this monster of an engine drove through a three-speed automatic gearbox suggests little more than a crude, four-door muscle car. But the 6.9 is packed with engineering intrigue and eccentricities. Like the fact that the engine was dry-sumped, racer style, both to avoid any unseemly bulges in the S-Class's lines and to stop the 12 litres of oil Mercedes deemed necessary to keep service intervals manageable from slopping about during heavy cornering. This, the complex hydropneumatic self levelling suspension and the limited-slip differential suggested that Mercedes expected owners to do more than simply waft about, the 6.9's popularity among contemporary F1 drivers, most famously James Hunt, suggesting many accepted the challenge.

Interior nothing like today's AMGs
Interior nothing like today's AMGs
Back to the future
So how does it measure up today? Thankfully Mercedes communications boss Rob Halloway is as passionate about the brand's older products as he is the new ones. And saw merit in sourcing a 6.9 - this one from Australia - to join the UK fleet to draw a line back to the birth of a spirit that lives on in today's AMGs. Good on you Rob!

When the 450 SEL was brought along to a recent AMG round-up event at Goodwood there wasn't the chance to attempt Fangio-like humiliation of more racy machinery (probably for the best...) on the track. But while the rest of the hacks made a bee-line for anything with a 63 in its name PH had only one car in its sights.

Nearly 40 years on from its debut in 1975 (it should have launched 18 months earlier but that would have been bang in the middle of the oil crisis), the 6.9 has lost none of its ability to surprise those in supposedly faster machinery.

286hp isn't key figure, 405 lb ft of torque is
286hp isn't key figure, 405 lb ft of torque is
Expect the unexpected
Pottering through a Sussex village at a steady 30, the BMW behind me was probably eyeing the approaching NSL sign and giant, Mercedes shaped rolling roadblock with dismay. I'd barely warmed the car through, was just settling into the springy, velour-trimmed seats and wasn't especially in a rushm but who's to refuse a challenge?

The way the 6.9 gathers speed is most unlike any modern car. But lacks none of the shock and awe it must have had at the time. 286hp doesn't sound so impressive but the 405lb ft of torque is the more important figure here. For all that dominance of the engine there's no sense of drama, no building revs, no V8 burble and no kick in the ribs. Just a slight whirr, a slow, steady movement of the needle on the tiny rev counter and that rather startled BMW suddenly a rapidly diminishing speck in the mirror. Gear changes slur imperceptibly, just a slight twitch in the rev counter announcing that they've even occurred and the big Merc doesn't so much accelerate as build speed. Rapidly.

No plans to recreate Fangio's antics
No plans to recreate Fangio's antics
The man behind the legend
Corners? Well, warned before departure that this car was yet to have its full mechanical overhaul did cool boots somewhat, huge amounts of play in that gigantic, dimpled steering wheel hardly instilling much confidence, ditto a distinct lack of much levelling going on in that fancy suspension.

Yet on the wide open A-roads around Goodwood discreet yet startling pace was easily maintained with just the tiniest applications of steering and throttle. Two tonnes of 70s Benz moving very quickly indeed remains a suitably incongruous sight but, at its heart, the 6.9 was built for it. As evidenced by the great Leonard Setright in his review in Car. Deciding that more typical use for a 6.9 would involve driving "from some industrialist's reserved park in Ludwigshafen to the Bundesministerium in Bonn for a spot of desk thumping and back in time for Mittagessen" LJK then discussed the thorny issue of fuel consumption with legendary Mercedes engineer Erich Waxenberger, the man often credited with creating the equally awesome 300SEL 6.3.

Fearing the 6.9 would be written off as an "antisocial thirst-raiser" Setright took heart in the fact Waxenberger demonstrated otherwise by recording 11mpg on an Autobahn trip of 124.3 miles in precisely one hour and 10 seconds.

And with blokes like that at the heart of its development how could the 6.9 be anything other than a true hero car?


MERCEDES-BENZ 450SEL 6.9
Engine:
6,834cc V8
Transmission: 3-speed, rear-wheel drive
Power (hp): 286@4,250rpm
Torque (lb ft): 405@3,000rpm
0-62mph: 7.4 sec
Top speed: 140mph
Weight: 1,935kg (DIN)
On sale: 1975-1980
Price new (c. 1977): £21,995
Price now: c. £15-20,000

Track photography by David Shepherd



Dan Trent
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Author Discussion

IanO

Original Poster:

98 posts

123 months

[news] 
Friday 27th July 2012 quote quote all
Ronin

Chicane-UK

3,544 posts

71 months

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Friday 27th July 2012 quote quote all
That is absolutely glorious!

anything fast

976 posts

50 months

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Friday 27th July 2012 quote quote all
a real peach.. would love to own one of these..

dba7108

127 posts

54 months

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Friday 27th July 2012 quote quote all
I'd love one of these!

Gridl0k

1,058 posts

69 months

[news] 
Friday 27th July 2012 quote quote all
Definitely Ronin, there's a corner of my lottery aircraft hangar reserved for this, an M5 and an 'ordi S8 with nitrous'

I need to drive one of these, my 310lb/ft C-Class is just too much fun. Torque monsters are so useful on english roads.

Obligatory Frankenheimer pr0n:

http://www.youtube.com/watch?v=HPI5-TSdC9w

Brown is the new black.

(I will stop editing this, promise, but isn't the start of that clip the best car park exit ever? I'm going to Tesco)

Edited by Gridl0k on Friday 27th July 11:51

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kwak

210 posts

38 months

[news] 
Friday 27th July 2012 quote quote all
I've been thinking about this car so much for the last couple of years. Even found a few for under €10k in germany. But I'm afraid my supply of brave pills is not big enough.

V8Triumph

5,982 posts

101 months

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Friday 27th July 2012 quote quote all
Yes please, want. cloud9lick

g3org3y

9,247 posts

77 months

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Friday 27th July 2012 quote quote all
V8Triumph said:
Yes please, want. cloud9lick
yes

St John Smythe

4,602 posts

103 months

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Friday 27th July 2012 quote quote all
IanO said:
Ronin
My thoughts exactly. Great car thumbup

300bhp/ton

29,629 posts

76 months

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Friday 27th July 2012 quote quote all
Yep that's definitely very cool! cool

Johnboy Mac

2,666 posts

64 months

[news] 
Friday 27th July 2012 quote quote all
''Fearing the 6.9 would be written off as an "antisocial thirst-raiser" Setright took heart in the fact Waxenberger demonstrated otherwise by recording 11mpg on an Autobahn trip of 124.3 miles in precisely one hour and 10 seconds.''

^^The best part of the blog.




Lovely, lovely car.



Edited by Johnboy Mac on Friday 27th July 12:08

thewheelman

2,194 posts

59 months

[news] 
Friday 27th July 2012 quote quote all
Lovely car, out of interest, does anyone know what happened to James Hunt's old car? I remember seeing pics of it on bricks, hope it didn't get scrapped.

housen

658 posts

78 months

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Friday 27th July 2012 quote quote all
saw one in london 2 weeks ago


guessing old money family 1 owner from new

mum and grandma in front 3 kids in back

was loverly

r129sl

3,829 posts

89 months

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Friday 27th July 2012 quote quote all
Car pitched the 6.9 against the Daimler Double Six, the Rolls Royce Silver Shadow and a Cadillac Seville in the September 1977 issue. The Jag won. It may have been Setright doing the writing. Here's a link:

http://www.ebay.co.uk/itm/9-77-Car-Mag-ft-Rolls-Ro...

Mel Nichols did the Silver Trashcan article, too, but that was later I think.

dom180

1,180 posts

150 months

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Friday 27th July 2012 quote quote all
Nice Fangio anecdote and a neat Merc.

Bonefish Blues

6,808 posts

109 months

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Friday 27th July 2012 quote quote all
OK, who rated this lower than a 10 - own up!

Strawman

5,511 posts

93 months

[news] 
Friday 27th July 2012 quote quote all
Good contemporary review of it here in Car and Driver magazine, mentions could be he did a review as well?
said:
Messed around LA next three days, picked up Mel Nichols, editor, Car magazine in London, his first trip to U.S. Boy, is he gonna see U.S.!
http://www.caranddriver.com/reviews/mercedes-benz-450sel-69-archived-road-test

405dogvan

4,279 posts

151 months

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Friday 27th July 2012 quote quote all
kwak said:
I've been thinking about this car so much for the last couple of years. Even found a few for under €10k in germany. But I'm afraid my supply of brave pills is not big enough.
There is no way this car would generate the bork level of a modern Merc unless you bought a rotten example.

MB is legendary for keeping parts for all it's cars (although the prices might be a bit intimidating) but there's an enormous amount of non-OEM spares available too.

Getting one of these and putting it back to perfect would likely be breathtakingly expensive - but getting a tidy one and just keeping it tidy cannot be such a daunting task surely?

I'd say an equiv. RR or Jag would be far, far riskier - and more contemporary Mercs have the ability to bork you for £1000s for just 1 minor electrical issue (such as Clarksons C600 and it's need for 6 coilpacks at over £1000 EACH).

also - LJKS, oh my, anyone who wasn't reading magazines when he was writing missed something very important in petrolhead evolution...

toppstuff

10,911 posts

133 months

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Friday 27th July 2012 quote quote all
Probably the coolest car on this entire website.

Epic. I really, really, really want one.


Turbobanana

470 posts

87 months

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Friday 27th July 2012 quote quote all
Saw one thundering through Lyme Regis a few weeks back. No one gave it a second look.

I seem to remember a story (probably from Classic & Sportscar) about the use of a 6.9 as a medical car for (if I recall) an F3 race in Brazil with (again, from distant memory) Carlos Reuteman driving. Apparently he asked the organisers how fast they wanted him to go, to which the reply was as fast as you like because you won't catch them. At the end of the first lap he was mid-pack.
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