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Mercedes-Benz W 111 tail fin requires meticulous maintenance

Mercedes-Benz W 111 rear fin - service station (35)
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M ancher may smile about it . 'At that time, Mercedes listed the most banal things in the maintenance plans,' says Mercedes-Benz W 111 tail fin specialist Günter Lehmann from Neuhaus an der Pegnitz. Be it retightening the screws on the seat back or oiling the trunk lid hinge, every little thing has been meticulously detailed to remind the fitters. Today these plans seem to have been forgotten in many workshops. Or the matter is taken less seriously because the tail fins cover fewer kilometers than before. However, this can turn out to be a serious mistake, because these maintenance specifications often include things that are overlooked but vital, such as tightening the front wishbones.

Correct maintenance of the Mercedes-Benz W111 is very important

In fact, there are always vehicles in workshops where the threaded bushings have loosened seriously. Correct maintenance is important, but Günter Lehmann attaches particular importance to their documentation. Because then you can at least partially adapt the maintenance plans given at the time to the lower annual mileage of the tail fins today and still make sure that all positions in the plans are ticked at some point. 'Unfortunately, many cars have a maintenance backlog,' says Lars Thurm from MB Classic Service West in Heinsberg in North Rhine-Westphalia.

Anyone who buys a Mercedes-Benz W 111 tail fin and takes it to the workshop may have to dig deep into your pocket. Leaks in the engine, gearbox, power steering or swollen brake hoses - these are just a few possible defects, which, in Thurm's experience, often reveals further damage when rectified. Anyone who has a tail fin in good condition can make ends meet with a manageable amount of service. This includes the annual oil change and the lubrication service. This includes the supply of many grease nipples with grease, for which Mercedes gave twelve minutes.

Inadequate lubrication leads to premature wear of the chassis

You could of course stress an authorized workshop, but it does Ultimately, it is better to invest in a little more time and thus be sure that all lubrication points have actually been supplied. Otherwise the customer will be foolish later and payexpensive undercarriage repairs because poor lubrication led to premature wear. Let's stay with the engine for now. The in-line six-cylinder unit built into the W 111s does not require excessive maintenance and is easily accessible. When it comes to carburetor service, it is often not just a matter of tightening the screws and nozzles in accordance with the maintenance instructions and checking the setting. Defective parts such as the accelerator pump or incorrect settings made in the past by laypeople can drive up costs.

Especially when a complete overhaul of the carburetor and manifold of the Mercedes-Benz 230 S is due, it becomes expensive. The heating flaps are located in the elbow, and their shafts should be lubricated from time to time. Replacing defective heating flaps is very time-consuming, which is reflected in the bill. The information in the service table on the next page relates to the Mercedes-Benz 230 S. Although almost everything can be transferred to the 220, there are still some differences. So with the mixture preparation. The 220 S has two register carburettors, each with a damper for the second stage, the oil level of which should be checked from time to time.

Engine overhaul in the Mercedes W 111 quickly exceeds 5,000 euros

And in the Mercedes-Benz W111 220 SE, a two-plunger injection pump from Bosch is used, the setting and overhaul of which is a case for Is expert. Pumps in exchange cost around 3,000 euros, but sometimes repairs are possible at a cheaper rate. The six-cylinder engines usually last a very long time, 'and if they break it is usually a bearing damage,' says Lehmann. He advises: 'When overhauling the engine, you should definitely take advantage of the potential for improvement.' We are talking about fine work such as dynamic balancing of the crank drive. The originality does not suffer, but it improves the smoothness. However, the costs then slightly exceed the lower limit of 5,000 euros given in the table above.

One more word about the prices. These were not always calculated with the often very expensive original parts from Mercedes, if there are alternatives. Take a water cooler, for example: It costs a good 2,000 euros, and soldering in a new network is significantly cheaper. Or the power steering, which is now worth around 5000 euros. They can be exchanged for around 700 euros. Workshops that have sources for purchasing parts in OEM quality or that offer repair options instead of new parts help save owners a lot of money. The opposite is true when the car falls into the wrong hands and repairs are carried out improperly.

Mercedes-Benz W111 - A reliable car with good maintenance

For example, when the steering gear is installed, the steering is rarely brought into the middle position and often notensure that the steering spindle is in the middle position before inserting it. As a consequence, the indicator no longer resets itself. Many a screwdriver is puzzled when lubricant still leaks despite new sealing rings on the rear wheel bearing. The solution to the problem: It was forgotten to check or rework the oil return helix that is located on the running surface for the inner sealing ring. Changing the sealing ring at the entrance of the differential also has its pitfalls. The flange on which the cardan shaft sits is fastened with a locknut. 'This is used to set the preload of the bearings, which is done with a friction torque wrench,' explains Lehmann. If you tighten the nut too tightly, you will compress the spacer sleeve between the tapered roller bearings too much and have to replace it. Incidentally, the bearings have to be greased, which is often neglected.

Renewing parts on the cardan shaft is also a professional job. The universal joints can only be changed with a press anyway, and they are caulked with center punch. And since the cardan shaft should be balanced in one piece, do-it-yourselfers have bad cards. On the other hand, all Mercedes-Benz W111 tailfin owners who maintain their cars according to regulations have good ones. Because those who stick to the most banal guidelines ultimately have a good laugh.


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