1972 Mercedes-Benz W109 300 SEL 3.5 - 8 cylinder


I'll never sell, so no offers please


One back passenger door won't open.

Heating controls are broken.

Odometer not working, dash light not working.

Air suspension was acting up.

Leaks a little brake fluid from a brake caliper.

Wouldn't start after lying idle outside for a long period.

Exhaust wore out.

Drivers window slips down, open about 3 inches due to worn winder cog inside the door. Can be pulled up by hand.

Some rust in the usual problem areas, but the car holding together pretty well.

General Comments:

I love this car. It is long wheelbase, same as the 6.3, just with smaller engine. The engine runs beautifully. Very reliable when used on a regular basis.

The one time it wouldn't start in the four years I have had it, was due to some rusty contacts points at the battery.

Air suspension holds car up for 1 to 4 days, depending on weather. Caused me a problem at one point, couldn't get the car to rise to its regular height until I discovered a linkage under front wheel had disconnected. Fixed with a plastic tie.

Would you buy another car from this manufacturer? Yes

Review Date: 13th July, 2006

22nd Jan 2015, 14:25

I have a 1971 300SEL 3.5 too.

They are a fantastic car - acres of room, plenty of power, and relaxing and comfortable to drive.

The air suspension is no problem if it's properly sorted out or reconditioned. There's nothing quite like the way these large, heavy cars eliminate humps and bumps.

Many Mercedes odometers stop working, because with time (usually about 250,000km) the interference fit between a nylon cog and a stainless steel spindle starts slipping. It can be fixed.

The W109 is an example of the combination of simplicity and refinement of the Mercedes cars of the era.

Well maintained, there's no reason they can't just keep going. Mine's 45 years old now, and is still in excellent condition.