Mercedes-Benz SEL V8s: Classic Comparison
BMW wasn’t the 1st German premium brand to build performance sedans – Mercedes-Benz has a longer – and no less illustrious – history of large, luxurious 4-door models powered by muscular V8 motors. We drive 3 SELs from one very special collection.
IMAGES: Charles Russell
Ronin is a film well known for its car chases through narrow European streets, but for Mercedes-Benz enthusiasts, there is 1 one star in the movie – no, not the E34-series BMW M5, or Robert De Niro – the brown SEL (450SEL 6.9), which was driven in a way only likely to be seen on the silver screen. Today, fortunately, no one is chasing me, although I am following other cars – in a less lairy fashion, of course.
The leading car is a “6.9”, driven by the owner of all 3 of these stately ‘Benzes. Next in the convoy is his wife, who’s piloting a rather special SEL – the Mercedes-Benz 300SEL 6.3. I am behind the wheel of what might be the only 280SEL 4.5 in South Africa, and I’m absorbing every second of the experience!

We head up the beautiful Outeniqua Mountain Pass outside George and the owner isn’t holding back. Watching the 2 grand Mercedes-Benz SEL limousines ahead of me follow the contours of the road is a sight to behold. Classic driving at its finest.
I’m driving the Mercedes-Benz 280SEL 4.5 first because it is the least powerful SEL here, but it feels remarkably nimble for a ’70s sedan. On paper, its 145 kW V8 is overshadowed by the more powerful 6.3 and 6.9, but the 280SEL 4.5 is also the lightest of the 3 and, as I shift the floor-mounted transmission lever to S, the ‘box drops to a lower gear (and holds it) as the ‘Benz powers out a series of bends.

Specifications:
- Model: Mercedes-Benz 280SEL 4.5
- Years of production: 1971–72
- Engine: 4.5-litre V8, petrol
- Power: 145 kW at 4 500 rpm
- Torque: 358 Nm at 3 000 rpm
- Transmission: 3-speed auto, RWD
- Weight: 1 705 kg
- Fuel consumption: 15 L/100 km
- 0-100 kph: 11 sec (claimed)
- Top Speed: 200 kph (claimed)
Once you have chosen your line and the initial body roll has settled, you can lean on the throttle with zeal. After you have mastered its ways, the 4.5 is even more satisfying to drive than you might imagine.

At this pace, the 4.5 easily keeps up with its Mercedes-Benz SEL siblings and all too soon, we need to turn off at a lookout point for our 1st shoot location, a perfect opportunity to examine all 3 engine bays.
The M100-series V8 in the 6.9’s engine bay looks the most modern unit, which it is, although anoraks will remind you it’s an evolution of the older (M100) 6.3-litre V8 found in the 300SEL 6.3. That engine was the first V8 installed in a Mercedes-Benz production car (originally launched in 1964 with the legendary 600 Grosser), while the 6.9’s motor was, and still is, one of the largest capacity engines ever slotted into a Mercedes-Benz – very appropriate indeed for the 1st range of cars that received the S-Class title.

With photographs in the bag, it is time to drive the other 2 sedans, and I head for the black 300SEL 6.3. Although it lacks an original steering wheel, the interior provides an experience to savour.
The dark red upholstery gives the cabin a luxurious aura, while the luscious red carpets further contribute to its almost Victorian ambience. Wood veneer can be found in the front and rear, too.

This car certainly has a story to tell… Rumours suggest it belonged to the Royal Family of Lesotho at some stage in its life. Strong evidence of this is the fixed divider, which separates the driver’s quarters from the rear – it’s not a feature often seen in these cars.
The divider means the driver’s seat is fixed in position, but that’s not a problem for me because I’m granted a more commanding view over the steering wheel. Aft occupants (likely to have been VIPs) have access to controls for the Becker radio and ventilation system – they’re not unlike those in the ‘Grosser.

Specifications:
- Model: Mercedes-Benz 300SEL 6.3 (W109)
- Years of production: 1967–72
- Engine: 6.3-litre V8, petrol
- Power: 184 kW at 4 000 rpm
- Torque: 500 Nm at 2 800 rpm
- Transmission: 4-speed auto, RWD
- Weight: 1 780 kg
- Fuel consumption: 15.5 L/100 km
- 0-100 kph: 6.5 sec (claimed)
- Top Speed: 220 kph (claimed)
Little effort is needed to use the 300SEL 6.3’s indicator stalk, and as I turn back onto the mountain pass, the engine is thoroughly warmed, which gives me license to drive the ‘Benz a little harder. I slowly press the long pedal, and immediately, I feel the V8’s eagerness, which translates into a swift burst of thrust.

As with the 280SEL 4.5, I take it slower through the corners, but the moment I can predict my trajectory out of a corner, I press the accelerator pedal again and find the 184 kW 300SEL 6.3 quite lively, despite its vintage. It took another 3 decades or so before Mercedes-Benz and the AMG tuning firm officially tied the knot, but the 1967 300SEL 6.3 is surely the 1st true Mercedes-Benz performance sedan!
For an apex Mercedes-Benz SEL, cubic capacity rules

At slower speeds, there is a slight delay before the engine responds to throttle inputs, followed by a lift of the nose while the long rear overhang dips closer to the ground. But it proves easy to keep an eye on the small, centrally mounted rev counter with its redline just over the 5 000 rpm mark.
I’m surprised by how similar the driving experiences of the 4.5 and 6.3 are. The willingness of the earlier apex Mercedes-Benz SEL engines and the gusto with which they rev (when haste is required) are almost identical. The additional weight of the 6.3 is easily offset by the bigger V8’s surplus power and torque.
With full air suspension, the 300SEL 6.3 was one of the most advanced performance sedans of its era, and it makes sense why this car’s US launch took place at the Laguna Seca race track in California and why the hugely talented Mercedes-Benz engineer and executive Rudolf Uhlenhaut attended that event.

Specifications:
- Model: Mercedes-Benz 450SEL 6.9 (V116)
- Years of production: 1975–80
- Engine: 6.8-litre (6 834 cm3) V8, petrol
- Power: 210 kW at 4 250 rpm
- Torque: 549 Nm at 3 000 rpm
- Transmission: 3-speed auto, RWD
- Weight: 1 935 kg
- Fuel consumption: 16 L/100 km
- 0-100 kph: 7.4 sec (claimed)
- Top Speed: 225 kph (claimed)
As we pull over for more detail and interior photography, the sun starts to set behind the mountains. Even in fading light, the 450SEL 6.9 has an imposing stance. With the longest body and wide tracks, it has the largest wheelbase here (2 960 mm). Owing to the Oil Crisis in the 1970s, Mercedes-Benz postponed the launch of its top S-Class by almost a year and a half, until September 1975. It was worth the wait, though.

This evening, almost 40 years later, I’m greeted by the smell of the lush and cosy velour interior of the 450SEL 6.9 (leather upholstery was optional). It overpowers the more traditional smell of Mercedes-Benz cars of this era. Once seated, the velour-trimmed chairs allow little movement, and I immediately feel as if I could drive this sedan late into the night. How plush and luxurious this car must have felt in its time.
Even when performing a simple task such as closing the 6.9’s door, I sense I’m dealing with a different beast. The door feels heavier than those of the other SELs and shuts with a more distinctive thud. Velour door inserts are framed by thick blue moulds, all contributing to the cocooning atmosphere of the cabin.

The 6.9, although technically a 6.8-litre (6 834 cm3) V8, was the perfect powertrain for Mercedes-Benz’s top-of-the-range S-Class at the time. Even though the 600 Grosser limousine was still available when the 450SEL 6.9 went into production, the top W116 S-Class eclipsed that car’s power and torque.
The 6.9’s M100 features mechanically controlled, Bosch K-Jetronic injection and dry-sump lubrication, and is mated with a 3-speed automatic transmission – the only ‘box ‘Benz had at the time that could handle all the torque! Needless to say, this engine’s character is vastly different to that of the 6.3.

As expected, the almost 2-tonne 450SEL 6.9 is slightly lazier and takes a more relaxed run through the rev range than its 2 Mercedes-Benz SEL predecessors. And once you’ve sampled as much acceleration as the “6.9” can muster (which is plenty), you can sit back, pull the armrest down and settle into a plush cruise. Thanks to a 96-litre fuel tank, fuel stops should not inconvenience the driver too much.

The improvements Mercedes-Benz made during the leap from the W108 and W109 to this V116 are immediately apparent, particularly when it comes to refinement, taken care of by the 450SEL 6.9’s suspension with hydro-pneumatic level control at the rear. Engine and road noise are kept well at bay, while the heavier kerb weight means the car feels more planted on the road. It also means you don’t really want to hustle it through corners. So it’s fortunate I wasn’t tasked with driving the 6.9 in Ronin…
Summary
Soon (too soon), the sun sets, and we drive the cars back to their neat garages, where they are stored and pampered. What a perfect evening to drive 3 of Mercedes-Benz’s most noteworthy large sedans from the previous century, each with an engine larger than most powerplants in ‘Benz’s current line-up.

I cannot pick a winner out of this Teutonic trio – that wasn’t the aim of this drive. Each V8-powered SEL offers a different experience, although the engine is the dominant factor in all 3 models. There is little in terms of an exhaust note, but when you put your foot down, you can hear those V8s working hard.
The 280SEL 4.5 was an export model for North America, making its presence here all the more special, and the 450SEL 6.9 was one of the fastest sedans of its time. However, if I had to buy one, the 300SEL 6.3 would give me the biggest smile every time I open the garage door. It’s one of the original Q-cars and the OG 6.3. But don’t take my word for it. When Road & Track tested this car new, the magazine called it not only “the greatest sedan in the world” but described it perfectly by stating it was “truly the executive road racer” and that it “does more different things well than any other single car”. Amen to that.
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