64 Exterior glass cleaning
64 21 80 2020552/10 May 6, 2021. Supersedes Technical Service Bulletin Group 64 number 20-74 dated May 8,
2020 for reasons listed below.
Model(s)

Year

VIN Range

Vehicle-Specific Equipment

All

2010 - 2022

All

Not Applicable

Condition
REVISION HISTORY
Revision

Date

Purpose

10

-

Revised header (Added model years and new models)

9

05/08/2020

Revised header (Added model years)

8

08/06/2018

Revised header (Added model years)
Revised Required Parts and Tools (Change to product numbers)

Customer states:
 The windshield is streaked, has a snakeskin appearance, or its surface feels rough.

Technical Background
Residue from industrial fallout as well as normal road dirt and grime may accumulate on the windshield.

Production Solution
Not applicable.

Service
Tip: This procedure must be performed and verified before a wiper blade replacement. All Warranty claims
will be rejected for wiper blade replacement if a defect is not found.

1.

Wash and dry all affected exterior glass surfaces.

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© 2021 Audi of America, Inc.
All rights reserved. Information contained in this document is based on the latest information available at the time of printing and is subject to the copyright and other intellectual property rights of Audi of
America, Inc., its affiliated companies and its licensors. All rights are reserved to make changes at any time without notice. No part of this document may be reproduced, stored in a retrieval system, or transmitted
in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, nor may these materials be modified or reposted to other sites, without the prior expressed written permission of the
publisher.

2.

Place wipers in the service position (Figure
1).

Figure 1. Windshield wipers in the service position.
3.

Using household glass cleaner (such as
Windex® or 3M™ Glass Cleaner), clean
residue from wiper blades (Figure 2).
Tip: Do not use the 3M™ Glass
Polishing Compound to clean the wiper
blades.

Figure 2. Cleaning wiper blades.
4.

Shake bottle of 3M™ Glass Polishing
Compound (Figure 3) to mix product evenly.

Figure 3. 3M™ Glass Polishing Compound.

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© 2021 Audi of America, Inc.
All rights reserved. Information contained in this document is based on the latest information available at the time of printing and is subject to the copyright and other intellectual property rights of Audi of
America, Inc., its affiliated companies and its licensors. All rights are reserved to make changes at any time without notice. No part of this document may be reproduced, stored in a retrieval system, or transmitted
in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, nor may these materials be modified or reposted to other sites, without the prior expressed written permission of the
publisher.

5.

Apply cleaner directly to the outside of the
windshield on both driver and passenger
sides (Figure 4).

Figure 4. Cleaner applied to the windshield.
6.

Use a clean, dry microfiber cloth (such as
3M™ Microfiber Detail Cloth - Yellow)
(Figure 5) to vigorously clean windshield
with long, horizontal strokes (Figure 6).
Try to avoid applying the product to the
window trim.

Figure 5. Detailing cloths.

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© 2021 Audi of America, Inc.
All rights reserved. Information contained in this document is based on the latest information available at the time of printing and is subject to the copyright and other intellectual property rights of Audi of
America, Inc., its affiliated companies and its licensors. All rights are reserved to make changes at any time without notice. No part of this document may be reproduced, stored in a retrieval system, or transmitted
in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, nor may these materials be modified or reposted to other sites, without the prior expressed written permission of the
publisher.

Figure 6. Using horizontal strokes to clean the windshield.
7.

Allow drying time until a fine film layer (haze) forms.
Tip: Drying time is based on ambient temperatures. Temperatures of 60°F (15°C) or lower can
extend drying time.

8.

Use a garden hose to rinse the windshield.
Also, rinse any product that was inadvertently
applied to the trim (Figure 7).

Figure 7. Rinsing the windshield.
9.

With a clean, dry microfiber cloth, dry and buff
glass to a clean shine (Figure 8).

Figure 8. Drying the windshield.

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© 2021 Audi of America, Inc.
All rights reserved. Information contained in this document is based on the latest information available at the time of printing and is subject to the copyright and other intellectual property rights of Audi of
America, Inc., its affiliated companies and its licensors. All rights are reserved to make changes at any time without notice. No part of this document may be reproduced, stored in a retrieval system, or transmitted
in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, nor may these materials be modified or reposted to other sites, without the prior expressed written permission of the
publisher.

10. With warm water, wet and ring out microfiber cloth. Wipe off any residue that made contact with trim or
rubber.

Warranty
This TSB is informational only and not applicable to any Audi Warranty.

Required Parts and Tools
Always check with your Parts Department and/or ETKA for the latest information and parts bulletins.
Part Number

Part Description

Quantity

60150

3MTM Glass Polishing Compound

01

(Please order through Audi Top Service Supplies & Touch Up Paint
eStore)
39016

3MTM Microfiber Detail Cloth – Yellow

01

(Please order through Audi Top Service Supplies & Touch Up Paint
eStore)

Additional Information
All parts and service references provided in this TSB (2020552) are subject to change and/or removal. Please
check the Repair Manual for fasteners, bolts, nuts, and screws that require replacement during the repair.
©2021 Audi of America, Inc. All rights reserved. Information contained in this document is based on the latest
information available at the time of printing and is subject to the copyright and other intellectual property rights of
Audi of America, Inc., its affiliated companies and its licensors. All rights are reserved to make changes at any
time without notice. No part of this document may be reproduced, stored in a retrieval system, or transmitted in
any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, nor may these
materials be modified or reposted to other sites, without the prior expressed written permission of the publisher.

Page 5 of 5
© 2021 Audi of America, Inc.
All rights reserved. Information contained in this document is based on the latest information available at the time of printing and is subject to the copyright and other intellectual property rights of Audi of
America, Inc., its affiliated companies and its licensors. All rights are reserved to make changes at any time without notice. No part of this document may be reproduced, stored in a retrieval system, or transmitted
in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, nor may these materials be modified or reposted to other sites, without the prior expressed written permission of the
publisher.