This article shows you how to repair an inoperative speedometer with fault code VAG 16885 (P0501)

Located in the Bentley Publishers online technical library.


In this video, Bentley Publishers technical editor Nick Czerula gives an overview of VW Golf Jetta New Beetle P1355, P1358, P1361, P1364 Repair Info and Technical Bulletin.

Many Volkswagen model radios have atheft feature that is enabled when battery power is lost. If “SAFE is displayed this article will help you enter code to unlock radio. Radio code is located on radio code card in owners manual or through an authorized Audi dealer.

The following article, located on our tech site, shows how to enter the code when SAFE is displayed.

Radio Code Entering – Volkswagen

Many Audi / VW model radios have an anti-theft feature that is enabled when battery power is lost. If “SAFE is displayed on your radio, then this article will help you enter code to unlock radio. The radio code itself is located on radio code card in owners manual or through an authorized Audi dealer. You will need this code before beginning the procedure.

The complete procedure is located at our online technical library:

Radio Code Entering



This video is a supplement for the articles:

Located on our tech site

How to Check Water pump Impeller 2 liter engine (AEG)

When performing cylinder leakage tests, the following tips might be helpful:

• Remove all spark plugs to allow easier rotation of the engine. (If this test is done
after a compression test, the plugs should already be out).

• Perform the leakage test on all cylinders, not just the problem cylinder. This would
indicate any other problems which can be rectified. This eliminates any repeat
repairs and wasted diagnostic time.

• Perform the leakage test in cylinder firing order starting with cylinder #1. It takes two
revolutions of the engine to complete the leakage test. Start at cylinder #1 and
rotate the engine to the next cylinder in the firing order. Divide the number of cylinders
into 720, the result is the number of degrees that each cylinder fires.

For example,
if you divide a 6 cylinder into 720, this equals 120 degrees. If you start at cylinder
1 and rotate the engine 120 degrees in the direction of rotation, you can check
the next cylinder in the firing order. This process eliminates the need to rotate the
engine an excessive amount.

The graphic depicts an engine with a firing order of: 1-5-3-6-2-4

If leakage is found monitoring area of loss will indicate failed component.

For example, excessive leakage on gauge and:
heard from exhaust would indicate a failed exhaust valve.
heard from intake manifold would indicate failed intake valve.
found in cooling system would indicate failed head gasket or cracked cylinder head.
heard in dipstick tube would indicate faulty piston rings.

Diesel engines are becoming more popular (in the US) as an option for personal vehicles. A fuel type synonymous with trucks and work vehicles is slowly finding its way into our daily lives. With quieter cleaner engines it’s getting harder to tell if the car you are in or behind has a diesel engine. Why all the buzz? Diesel engines are known for providing better fuel economy than gasoline engines along with fantastic torque. With new emission standards and equipment they have even become cleaner.

If you’re ready to make diesel a part of your life weigh your options first. As attractive as high fuel economy sounds it may bring little to no relief to your wallet.



The U.S. version of BMW’s 2009 diesel-powered 335d sedan with a 6-speed automatic transmission should achieve EPA fuel-economy estimates of 23 miles per gallon in the city and 33 mpg on the highway.

265 HP
425 lb-ft torque
Cost: $50,895

BMW 330i

42 mpg hwy / 23.7 mpg city / 32.6 mpg combined
255 HP @
220 lb-ft torque
Cost: $36,500

Looking at two BMW models the gasoline engine is by far the better option. No savings when it comes to intial purchase or fuel costs. Diesel is an average of $1.00 more per gallon as gasloine and the 335d is 14K more than a 330.

When it comes to BMW gasoline wins big!



2009 Mercedes Benz E-Class E320 BlueTec DIESEL SEDAN
The 210 hp from the diesel V6 sounds modest, but the 400 lb-ft of torque from 1,600-2,400 rpm is more than enough power. The EPA rates the E320 at 23 city, 32 highway and 26 combined.


210 hp
400 lb-ft torque
Cost: $58,345

2009 Mercedes-Benz E-Class E320

3.0L V6
210 hp
23 mpg city / 32 mpg hwy
Cost: $54,200

With Mercedes-Benz it is the same story. The cost is much closer, however there are no gains in fuel economy.



The 2009 Jetta TDI gets a 140-hp turbo-diesel (40 more than the previous 1.9-liter engine) with 236 pound-feet of torque (59 more than before). The new engine is clean—enough so that it can be purchased in every state. According to the EPA, the Jetta TDI achieves 29 mpg in the city and 40 on the highway.


140 hp
236 lb-ft torque
29 mpg city / 40 mpg hwy
Cost: $22,640

2009 Jetta 2.5

170 hp
177 lb-ft torque
21 mpg city / 29 mpg hwy
Cost: $17,515

Even VW falls short making it worth while to own a diesel.

Where does this leave us? Is diesel an option for US car owners.


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